To provide a tool for assisting rotary lateral motion with which burden on a user and a care giver is eliminated and self-support is easily attained since the tool uses a foil sheet and enables socks to be reliably put on in an easy and simple fashion at a stretch without giving an unnatural feeling to the user and which can be used by whole users.

The end of the toe of a thin and long sheet having a foot width includes a curl or a fold having shape 2 curled upwardly toward the near side, etc. The opposite part forms a grip pull 3 having a thin width, a pull tab ring hole 4 arranged at the distal end of a part having a proper length, or a projected grip pull part 3.