diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index f9a765ad457..9a965aeb860 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -440,6 +440,7 @@ pub mod range;
 pub mod request;
 pub mod response;
 pub mod rtcpeerconnection;
+pub mod rtcsessiondescription;
 pub mod screen;
 pub mod serviceworker;
 pub mod serviceworkercontainer;
diff --git a/components/script/dom/rtcsessiondescription.rs b/components/script/dom/rtcsessiondescription.rs
new file mode 100644
index 00000000000..284774db7a3
--- /dev/null
+++ b/components/script/dom/rtcsessiondescription.rs
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::RTCSessionDescriptionBinding;
+use crate::dom::bindings::codegen::Bindings::RTCSessionDescriptionBinding::RTCSessionDescriptionInit;
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::reflector::{DomObject, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::window::Window;
+use dom_struct::dom_struct;
+
+#[dom_struct]
+pub struct RTCSessionDescription {
+    reflector: Reflector,
+}
+
+impl RTCSessionDescription {
+    pub fn new_inherited() -> RTCSessionDescription {
+        RTCSessionDescription {
+            reflector: Reflector::new(),
+        }
+    }
+
+    pub fn new(global: &GlobalScope) -> DomRoot<RTCSessionDescription> {
+        reflect_dom_object(
+            Box::new(RTCSessionDescription::new_inherited()),
+            global,
+            RTCSessionDescriptionBinding::Wrap,
+        )
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        _config: &RTCSessionDescriptionInit,
+    ) -> Fallible<DomRoot<RTCSessionDescription>> {
+        Ok(RTCSessionDescription::new(&window.global()))
+    }
+}
diff --git a/components/script/dom/webidls/RTCSessionDescription.webidl b/components/script/dom/webidls/RTCSessionDescription.webidl
new file mode 100644
index 00000000000..4072a2fe90d
--- /dev/null
+++ b/components/script/dom/webidls/RTCSessionDescription.webidl
@@ -0,0 +1,25 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/webrtc-pc/#rtcsessiondescription-class
+
+[Constructor(RTCSessionDescriptionInit descriptionInitDict),
+ Exposed=Window, Pref="dom.webrtc.enabled"]
+interface RTCSessionDescription {
+    // readonly attribute RTCSdpType type;
+    // readonly attribute DOMString  sdp;
+    // [Default] object toJSON();
+};
+
+dictionary RTCSessionDescriptionInit {
+    required RTCSdpType type;
+             DOMString  sdp = "";
+};
+
+enum RTCSdpType {
+    "offer",
+    "pranswer",
+    "answer",
+    "rollback"
+};