Auxiliary apparatus for assisting user in using portable device or supporting hand or wrist

The present invention provides an auxiliary device capable of effectively assisting the use of a portable terminal device while sufficiently suppressing damage to portability in practical use. The auxiliary device is provided with an abutting section that abuts against the front surface of the user; a support unit that supports the user's hand at a position at a predetermined distance from the contact unit and has a width formed in accordance with the user's one hand or both hands; a connecting part for connecting the contact part and the support part; and a fixing unit for fixing a band to beused by being hung on the body of a user. 本发明提供在实用上能充分抑制便携性受损同时能有效地辅助便携终端设备的使用的辅助装置。辅助用户使用便携终端设备的辅助装置具备：抵接部，其抵接于用户的前表面；支撑部，其将用户的手支撑于离上述抵接部预定距离的位置，并具有按照用户的单手或者双手形成的宽度；连结部，其连结上述抵接部和上述支撑部；以及固定部，其对挂在用户的身体上来使用的带进行固定。