An outside handle for a sliding door includes a base member, a grip member, and a lever. The base member is mounted on a door panel and has a first hole formed at one end thereof. The grip member is rotatably and slidably mounted to the base member and has a first hook formed at one end thereof, the first hook being inserted into the first hole. The lever is connected to the first hook of the grip member and is positioned in the first hole of the base member to enable rotation and sliding of the lever in response to rotation and sliding of the grip member. The outside handle improves the operation convenience and ease of assembly of outside handles for sliding doors.