To provide a power transmission device capable of transmitting driving force from an arbitrary gear shaft selected from a plurality of gear shafts to a driven body, changing the driving speed of the driven body, and driving a plurality of driven bodies at the same time.

The power transmission device is formed to transmit driving force from a primary mover part to the driven bodies. The power transmission device is formed of a power transmission part side frame part, a plurality of gears meshed with each other in the power transmission part side frame part, and the plurality of gear shafts capable of rotatably fixing each of the gears to the power transmission part side frame part. The gear shafts are used as drive shafts for transmitting driving force from the prime mover to the driven bodies.

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