diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70d3b93570..b03f1a2c07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,8 +24,10 @@ and this project adheres to
   `Decimal256`. ([#1902])
 - cosmwasm-std: Remove operand strings from `OverflowError`,
   `ConversionOverflowError` and `DivideByZeroError`. ([#1896])
+- cosmwasm-std: Add optional memo field to `IbcMsg::Transfer`. ([#1878])
 
 [#1874]: https://github.com/CosmWasm/cosmwasm/pull/1874
+[#1878]: https://github.com/CosmWasm/cosmwasm/pull/1878
 [#1879]: https://github.com/CosmWasm/cosmwasm/pull/1879
 [#1890]: https://github.com/CosmWasm/cosmwasm/pull/1890
 [#1896]: https://github.com/CosmWasm/cosmwasm/pull/1896
diff --git a/contracts/ibc-reflect-send/schema/ibc-reflect-send.json b/contracts/ibc-reflect-send/schema/ibc-reflect-send.json
index cf36088129..f863c79d43 100644
--- a/contracts/ibc-reflect-send/schema/ibc-reflect-send.json
+++ b/contracts/ibc-reflect-send/schema/ibc-reflect-send.json
@@ -424,6 +424,13 @@
                     "description": "existing channel to send the tokens over",
                     "type": "string"
                   },
+                  "memo": {
+                    "description": "optional memo",
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
                   "timeout": {
                     "description": "when packet times out, measured on remote chain",
                     "allOf": [
diff --git a/contracts/ibc-reflect-send/schema/ibc/packet_msg.json b/contracts/ibc-reflect-send/schema/ibc/packet_msg.json
index 00bcd35219..f8f8640a5c 100644
--- a/contracts/ibc-reflect-send/schema/ibc/packet_msg.json
+++ b/contracts/ibc-reflect-send/schema/ibc/packet_msg.json
@@ -362,6 +362,13 @@
                   "description": "existing channel to send the tokens over",
                   "type": "string"
                 },
+                "memo": {
+                  "description": "optional memo",
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                },
                 "timeout": {
                   "description": "when packet times out, measured on remote chain",
                   "allOf": [
diff --git a/contracts/ibc-reflect-send/schema/raw/execute.json b/contracts/ibc-reflect-send/schema/raw/execute.json
index 5fee9b17a4..1765e73a74 100644
--- a/contracts/ibc-reflect-send/schema/raw/execute.json
+++ b/contracts/ibc-reflect-send/schema/raw/execute.json
@@ -413,6 +413,13 @@
                   "description": "existing channel to send the tokens over",
                   "type": "string"
                 },
+                "memo": {
+                  "description": "optional memo",
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                },
                 "timeout": {
                   "description": "when packet times out, measured on remote chain",
                   "allOf": [
diff --git a/contracts/ibc-reflect-send/src/contract.rs b/contracts/ibc-reflect-send/src/contract.rs
index 23adc82b89..d3a2bfe441 100644
--- a/contracts/ibc-reflect-send/src/contract.rs
+++ b/contracts/ibc-reflect-send/src/contract.rs
@@ -157,6 +157,7 @@ pub fn handle_send_funds(
         to_address: remote_addr,
         amount,
         timeout: env.block.time.plus_seconds(PACKET_LIFETIME).into(),
+        memo: None,
     };
 
     let res = Response::new()
diff --git a/contracts/ibc-reflect-send/src/ibc.rs b/contracts/ibc-reflect-send/src/ibc.rs
index 6faabd5c10..511a7b1518 100644
--- a/contracts/ibc-reflect-send/src/ibc.rs
+++ b/contracts/ibc-reflect-send/src/ibc.rs
@@ -410,12 +410,14 @@ mod tests {
                 to_address,
                 amount,
                 timeout,
+                memo,
             }) => {
                 assert_eq!(transfer_channel_id, channel_id.as_str());
                 assert_eq!(remote_addr, to_address.as_str());
                 assert_eq!(&coin(12344, "utrgd"), amount);
                 assert!(timeout.block().is_none());
                 assert!(timeout.timestamp().is_some());
+                assert!(memo.is_none());
             }
             o => panic!("unexpected message: {o:?}"),
         }
diff --git a/contracts/ibc-reflect-send/tests/integration.rs b/contracts/ibc-reflect-send/tests/integration.rs
index 21d5c95352..ea8a70f8d2 100644
--- a/contracts/ibc-reflect-send/tests/integration.rs
+++ b/contracts/ibc-reflect-send/tests/integration.rs
@@ -234,12 +234,14 @@ fn send_remote_funds() {
             to_address,
             amount,
             timeout,
+            memo,
         }) => {
             assert_eq!(transfer_channel_id, channel_id.as_str());
             assert_eq!(remote_addr, to_address.as_str());
             assert_eq!(&coin(12344, "utrgd"), amount);
             assert!(timeout.block().is_none());
             assert!(timeout.timestamp().is_some());
+            assert!(memo.is_none());
         }
         o => panic!("unexpected message: {o:?}"),
     }
diff --git a/contracts/ibc-reflect/schema/ibc/packet_msg.json b/contracts/ibc-reflect/schema/ibc/packet_msg.json
index 3b9ebaef68..6856f57368 100644
--- a/contracts/ibc-reflect/schema/ibc/packet_msg.json
+++ b/contracts/ibc-reflect/schema/ibc/packet_msg.json
@@ -349,6 +349,13 @@
                   "description": "existing channel to send the tokens over",
                   "type": "string"
                 },
+                "memo": {
+                  "description": "optional memo",
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                },
                 "timeout": {
                   "description": "when packet times out, measured on remote chain",
                   "allOf": [
diff --git a/contracts/reflect/schema/raw/execute.json b/contracts/reflect/schema/raw/execute.json
index 4180145986..abd024e972 100644
--- a/contracts/reflect/schema/raw/execute.json
+++ b/contracts/reflect/schema/raw/execute.json
@@ -467,6 +467,13 @@
                   "description": "existing channel to send the tokens over",
                   "type": "string"
                 },
+                "memo": {
+                  "description": "optional memo",
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                },
                 "timeout": {
                   "description": "when packet times out, measured on remote chain",
                   "allOf": [
diff --git a/contracts/reflect/schema/reflect.json b/contracts/reflect/schema/reflect.json
index 641d7498d7..21b899f174 100644
--- a/contracts/reflect/schema/reflect.json
+++ b/contracts/reflect/schema/reflect.json
@@ -477,6 +477,13 @@
                     "description": "existing channel to send the tokens over",
                     "type": "string"
                   },
+                  "memo": {
+                    "description": "optional memo",
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  },
                   "timeout": {
                     "description": "when packet times out, measured on remote chain",
                     "allOf": [
diff --git a/packages/std/src/ibc.rs b/packages/std/src/ibc.rs
index 1a732f3e55..17c60ae87f 100644
--- a/packages/std/src/ibc.rs
+++ b/packages/std/src/ibc.rs
@@ -35,6 +35,8 @@ pub enum IbcMsg {
         amount: Coin,
         /// when packet times out, measured on remote chain
         timeout: IbcTimeout,
+        /// optional memo
+        memo: Option<String>,
     },
     /// Sends an IBC packet with given data over the existing channel.
     /// Data should be encoded in a format defined by the channel version,
@@ -793,9 +795,10 @@ mod tests {
             to_address: "my-special-addr".into(),
             amount: Coin::new(12345678u128, "uatom"),
             timeout: IbcTimeout::with_timestamp(Timestamp::from_nanos(1234567890)),
+            memo: None,
         };
         let encoded = to_string(&msg).unwrap();
-        let expected = r#"{"transfer":{"channel_id":"channel-123","to_address":"my-special-addr","amount":{"denom":"uatom","amount":"12345678"},"timeout":{"block":null,"timestamp":"1234567890"}}}"#;
+        let expected = r#"{"transfer":{"channel_id":"channel-123","to_address":"my-special-addr","amount":{"denom":"uatom","amount":"12345678"},"timeout":{"block":null,"timestamp":"1234567890"},"memo":null}}"#;
         assert_eq!(encoded.as_str(), expected);
     }