PORTABLE DEVICE

摘要

A portable device (2) having a built-in electronic component has normal mode, in which the electronic component functions, and power saving mode, in which power less than that consumed in the normal mode is consumed. The portable device (2) is provided with: a use state detection unit (21) that detects the in-use state or the non in-use state of the portable device (2); and a mode control unit (21) that shifts the mode of the portable device (2) to the power saving mode, in the cases where a fixed time has elapsed after the use state detection unit (21) detected that the state of the portable device (2) is shifted to the non in-use state.