To provide a fluorescent lamp type semiconductor lamp which can easily change irradiation direction while being attached to lighting equipment as it is and, further, can adjust fastening force in the irradiation direction.

In a fluorescent lamp type semiconductor lamp, a light-emitting tube part 1 inserted between sleeve parts 2, 2 is made swingable around a center axial line, is locked at a prescribed angular position to exhibit a fastening force, the locking is released by applying a torque in the swinging direction to the light-emitting part 1 and, therefore, the irradiation direction can be changed in the attachment state. Therein, the sleeve parts 2, 2 a stationary side member 3 of which one edge side is fastened to the light-emitting part 1 and a movable member 4 which is pivotally supported to the other edge side and is made swingable. Further, a protrusion part 45 disposed on one side of opposed surfaces with which the stationary member 3 and the movable member 4 are brought into sliding contact and a recessed part 300 disposed on the other side thereof are pressed in an adhesion direction on the locking position and, thereby, a fastening force is exhibited. As the result, by performing swinging operation of a gear 37, a pressing force of the spring member 34 is changed and the fastening force is adjusted.