A cartridge includes: a rotation body; and an electrode member. The electrode member is configured to supply the rotation body with electric power from an external electrode provided outside of the cartridge. The electrode member includes: a contact portion; and an urging portion. The contact portion is configured to be contacted by the external electrode. The urging portion is in a shape of a coil formed by winding a wire rod and configured to urge the contact portion toward the external electrode such that the contact portion is pivotally moved about the urging portion.