To provide a direct-acting generator which increases the amount of a winding wire without increasing the stroke length.

Magnetic line passing parts 2, spaced a first distance g1 away from an inner movable yoke 103, and magnetic line interruption parts 3, spaced a second distance g2 that is larger than the first distance g1 away from the inner movable yoke, are formed on inner walls 105a, 105b of an outer fixed yoke 105.