To provide a portable terminal holding tool in which a portable terminal can be easily attached and detached, the portable terminal can be held without depending on the size, and the portable terminal can be protected when the portable terminal holding tool holding the portable terminal falls down.

A portable terminal holding tool which holds a portable terminal, includes a holder comprised of a curved accepting part which is formed from a material having plasticity for wrapping corners of the portable terminal from the outside, and a hollow holding part provided at a terminal side of the accepting part for inserting the corners of the portable terminal therein.