diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61e90397..d811a283 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ Improvements:
 
 * Add `r0::device` endpoints
 * Add `r0::room::get_room_event` (introduced in r0.4.0)
+* Add `r0::read_marker::set_read_marker` (introduced in r0.4.0)
 
 # 0.5.0
 
diff --git a/src/r0.rs b/src/r0.rs
index 68d5a76f..cf8718c4 100644
--- a/src/r0.rs
+++ b/src/r0.rs
@@ -15,6 +15,7 @@ pub mod message;
 pub mod presence;
 pub mod profile;
 pub mod push;
+pub mod read_marker;
 pub mod receipt;
 pub mod redact;
 pub mod room;
diff --git a/src/r0/read_marker.rs b/src/r0/read_marker.rs
new file mode 100644
index 00000000..7b9e14c3
--- /dev/null
+++ b/src/r0/read_marker.rs
@@ -0,0 +1,3 @@
+//! Endpoints for "fully read markers"
+
+pub mod set_read_marker;
diff --git a/src/r0/read_marker/set_read_marker.rs b/src/r0/read_marker/set_read_marker.rs
new file mode 100644
index 00000000..e7dbd31d
--- /dev/null
+++ b/src/r0/read_marker/set_read_marker.rs
@@ -0,0 +1,35 @@
+//! [POST /_matrix/client/r0/rooms/{roomId}/read_markers](https://matrix.org/docs/spec/client_server/r0.6.0#post-matrix-client-r0-rooms-roomid-read-markers)
+
+use ruma_api::ruma_api;
+use ruma_identifiers::{EventId, RoomId};
+
+ruma_api! {
+    metadata {
+        description: "Sets the position of the read marker for a given room, and optionally the read receipt's location.",
+        method: POST,
+        name: "set_read_marker",
+        path: "/_matrix/client/r0/rooms/:room_id/read_markers",
+        rate_limited: true,
+        requires_authentication: true,
+    }
+
+    request {
+        /// The room ID to set the read marker in for the user.
+        #[ruma_api(path)]
+        pub room_id: RoomId,
+
+        /// The event ID the read marker should be located at.
+        /// The event MUST belong to the room.
+        #[serde(rename = "m.fully_read")]
+        pub fully_read: EventId,
+
+        /// The event ID to set the read receipt location at.
+        /// This is equivalent to calling the create_read_receipt endpoint and is
+        /// provided here to save that extra call.
+        #[serde(rename = "m.read", skip_serializing_if = "Option::is_none")]
+        pub read_receipt: Option<EventId>,
+
+    }
+
+    response {}
+}