A multi-directional input device, comprising: a case having a bottom plate; a pair of upper and lower arms (200, 300) supported to be movable in two orthogonal directions in the case, the pair of upper and lower arms (200, 300) each having an elongated hole (210, 310) extending in a direction orthogonal to a moving direction; an operation shaft that is rotatable in a state of penetrating each elongated hole (210, 310); the operation shaft is supported to be rotatable about a center of curvature of the receiving surface, the operation shaft is provided with an engaging portion (430a, 430b) with the lower arm, and the engaging portion (430a, 430b) has a downward engaging surface (431a, 431b) that is curved along the curved upper surface of the lower arm and is movable on the curved upper surface of the lower arm when the operation shaft rotates; an actuating member that is supported to be movable in an axial direction of the operation shaft at a lower end of the operation shaft projecting downward of the lower arm, and is provided with a downward convex spherical trapezoidal portion whose diameter decreases downward; a compression coil spring that is provided between the operation shaft and the actuating member, and presses the downward convex spherical trapezoidal portion against the bottom plate to return the operation shaft to a neutral state; and a plurality of electric components (1000, 1100) operated via each arm (200, 300) by rotation of the operation shaft, characterized in that an upward convex spherical trapezoidal portion whose diameter decreases upward is provided at a lower end of the operation shaft projecting downward of the lower arm, a receiving portion for the upward convex spherical trapezoidal portion is provided in the case, the receiving portion has a receiving surface that is configured with a spherical surface having a radius of curvature identical to a radius of curvature of a spherical zone of the upward convex spherical trapezoidal portion, the receiving surface against which a spherical zone of the upward convex spherical trapezoidal portion is pressed from downward by the compression coil spring, the lower arm has a curved upper surface provided along a cylindrical surface arranged coaxially on one horizontal axis that passes through the center of curvature of the receiving surface and extends in a moving direction of the lower arm. a case having a bottom plate; a pair of upper and lower arms (200, 300) supported to be movable in two orthogonal directions in the case, the pair of upper and lower arms (200, 300) each having an elongated hole (210, 310) extending in a direction orthogonal to a moving direction; an operation shaft that is rotatable in a state of penetrating each elongated hole (210, 310); the operation shaft is supported to be rotatable about a center of curvature of the receiving surface, the operation shaft is provided with an engaging portion (430a, 430b) with the lower arm, and the engaging portion (430a, 430b) has a downward engaging surface (431a, 431b) that is curved along the curved upper surface of the lower arm and is movable on the curved upper surface of the lower arm when the operation shaft rotates; an actuating member that is supported to be movable in an axial direction of the operation shaft at a lower end of the operation shaft projecting downward of the lower arm, and is provided with a downward convex spherical trapezoidal portion whose diameter decreases downward; a compression coil spring that is provided between the operation shaft and the actuating member, and presses the downward convex spherical trapezoidal portion against the bottom plate to return the operation shaft to a neutral state; and a plurality of electric components (1000, 1100) operated via each arm (200, 300) by rotation of the operation shaft, characterized in that an upward convex spherical trapezoidal portion whose diameter decreases upward is provided at a lower end of the operation shaft projecting downward of the lower arm, a receiving portion for the upward convex spherical trapezoidal portion is provided in the case, the receiving portion has a receiving surface that is configured with a spherical surface having a radius of curvature identical to a radius of curvature of a spherical zone of the upward convex spherical trapezoidal portion, the receiving surface against which a spherical zone of the upward convex spherical trapezoidal portion is pressed from downward by the compression coil spring, the lower arm has a curved upper surface provided along a cylindrical surface arranged coaxially on one horizontal axis that passes through the center of curvature of the receiving surface and extends in a moving direction of the lower arm.