To provide a novel effective spot light for an effective lighting apparatus offering simple construction permitting safe, reliable and easy exchange or position adjustment of a bulb.

A socket holder 6 is supported to be slidable between a front position where an emission portion 2a of the bulb 2 exists in a reflector 3 with its lighting center almost corresponding to the focal point of the reflector 3 and a rear position where the emission portion 2a of the bulb 2 is extracted from the reflector 3, and it is supported to be movable between the rear position and an exchange position where the socket holder 6 is turned and a socket 7 and the bulb 2 are protruded outside a lamp body 1 to make the bulb exchangeable.