A printer that can reduce a manufacturing cost is obtained. The printer according to the invention includes a casing as a base member, a movable member and a spring. The movable member is movable with respect to the casing. The spring is located between the casing and the movable member. The casing is provided at a position opposed to the lower end of the spring with a projected portion (circular convex portion) arranged to pinch the lower end of the spring. The position of the spring with respect to the casing is fixed by the state in which the lower end of the spring is arranged radially inside the circular convex portion. The movable member is provided at a position opposed to the upper end remote from the lower end of the spring with a fixing portion (projected fixing portion) for fixing the upper end of the spring.