Provided is a solenoid-type variable damping force damper that improves the strength of the piston and prevents wire break in the electromagnetic coil. A piston includes a piston main body, an expansion-side valve plate, a contraction-side valve plate, an electromagnetic coil, and a bolt. The piston main body is an integrally formed component made of a ferromagnetic material, and includes a hollow cylindrical outer yoke that is in slidable contact with an inner peripheral surface of a cylinder, a columnar inner yoke having an outer peripheral surface opposing an inner peripheral surface of the outer yoke via first and second gaps, and a connection member connecting the outer yoke and the inner yoke with each other at an axially middle position of the piston and separating the first and second gaps from each other. The electromagnetic coil is fitted in the second gap of the piston main body.