To remove an adverse effect of noises occurring from a power supply unit in a personal computer on a peripheral device.

The power supply noise eliminating device comprises two connectors for providing a filter means between a power supply unit and a peripheral device. One of the connectors is connected to a connector on the side of a power supply means of supplying a DC voltage generated based on an AV voltage to the peripheral device in a personal computer. The other connector is connected to a connector on the side of the peripheral device. The filter means is constituted of a troidal coil and a condenser which are provided in a wiring part connecting the DC voltages corresponding to these connectors, respectively.