A swing assembly includes a main support frame and a swing chair unit. The main support frame includes four spaced-apart upright posts, and a top frame connected to the upright posts. The swing chair unit includes a suspending frame hung movably on the top frame, and a seat frame held by the suspending frame. The swing assembly further includes a roof assembly mounted on the top frame, and a drape assembly hung on the top frame and extending downwardly along and between the upright posts.