Abstract: The hand exerciser is made of a resilient material and has a number of finger engaging ports each connected to one side of a body portion by bridging segments. The body portion to the side thereof opposite the finger engaging ports includes a thumb engaging port. The hand exerciser is particularly useful for strengthening of the muscles used during the extension of the fingers and movement of the thumb in a generally rearwardly direction. The exerciser is preferably made of a one piece rubber material and can easily be produced by moulding.