To provide a desktop holder that facilitates a person to supply a mobile terminal with power using the power of water waves.

The desktop holder 301 includes a holder 11 in which the mobile terminal 95 is fitted, a hole 15 through which water comes in and out, and a body 10 having a bottom 12 supporting the holder 11 on a plane, a wave power generating unit 13 which generates electric power using water waves coming in through the hole 15 of the bottom 12, and a power supply unit 14 which supplies power generated by the wave power generating unit 13 to the mobile terminal 95 fitted in the holder 11.