Abstract: A self-closing sliding door assembly comprising, a doorway (2) in a wall (4), a substantially planar door (6) mounted for slidable movement with respect to the doorway to open and close the doorway, a closer (12) mounted on one of the door (6) and wall (4) having a drive shaft (14) rotatable about an axis, and an arm assembly having first and second arm members (16, 18) connected to each other by a first pivotal join (20), the first arm member being connected to the drive shaft and the second arm member being connected by a second pivotal join (22) to the other of the one of the door and wall, wherein the drive shaft is arranged to urge the first arm member to pivot about the axis whereby the arm assembly urges the door to close the doorway.