A power generation device includes a push button, a slider, a first spring, and a power generation unit. A first spring has a first end engaging the push button, and a second end engaging the slider. The power generation unit includes a first yoke member, a second yoke member, and a coil. The second yoke member includes a first movable member and a second movable member. The first movable member includes a first permanent magnet and is held in the slider. The second movable member includes a second permanent magnet and is held in the slider. The first yoke member is disposed between the first movable member and the second movable member. The coil is disposed to the outer periphery of the first yoke member.