To provide fluorescent lighting fixtures with a vibration insulation holder of a long lamp with high reliability by mounting almost a U-shaped holder from the surface of a reflecting plate, and completely eliminating shaking/vibration of a lamp.

The fluorescent lighting fixtures has a fixture body 1 whose one end is opened and having a U-shaped cross section; a reflecting plate 2 having an opposite umbrella-shaped cross section arranged so as to completely cover the opening surface of the fixture body 1; a decorative screw 5 detachably mounting the reflecting plate 2 on the fixture body 1; and almost the U-shaped holder 3 suppressing shaking/vibration of the lamp in almost the central part of the long fluorescent lamp. A pair of fitting holes to one of the holder 3 is formed on the surface of the reflecting plate 2, the lamp 6 is detachably arranged at the free end of almost the U-shaped holder 3, a lamp holding portion having elasticity suppressing shaking is formed, a U-shaped bottom is projected to the free end having spring properties so that the tip comes in contact when the lamp is mounted, a fitting claw is installed in the opposite direction to the opening side on right and left sides of the u-shaped bottom. And a process engaging with the fitting hole of the reflecting plate 2 is conducted as follows. The shape of the holder is set so that the side in the vicinity of the u-shaped bottom 36 is pinched, and fit to the fitting hole of the reflecting plate 2.