To allow the attaching position of a hand rail to be easily changed suitable to a user to fully display its support function.

This hand rail device is provided with a support base 3 which has a guide part 12 and is fixed to an attaching face W, a sliding base 2 which can be slid along the guide part 12, and a hand rail body 1 which is attached to the sliding base 2. By sliding the sliding base 2 against the support base 3, a position of the hand rail body 1 relating to the attaching face W can be changed. A result is that a position of the hand rail body 1 can easily be changed suitably to conditions of a user such as the physical features and position, and the hand rail can fully display its support function.