To allow fixing operation and the operation of fixation release to be easy while permitting a movable shelf drawn out to the front to be firmly fixed and simplify such structure.

Rollers 14, 15 and 16 roll on the lower wall 12c of a guide rail 12, so that a movable shelf 8 slides and moves in backward and forward directions. Moreover, stoppers 17 and 18 are arranged at the upper and lower parts, respectively, at the front part of the guide rail 12 between the upper and lower wall 12a and 12c of the guide rail 12. After the small rollers 14 and 15 pass through the underside of the upper stopper 18 and get over the lower stopper 17 to move forward, the forward move of the large roller 16 is obstructed by the upper stopper 18. The backward move of the small roller 15 at the back side is obstructed by the lower stopper 17. As a result of this, the movable shelf 8 is held in a state in which it is drawn out to the front of the front opening 1a of a refrigerator main body 1 to the horizontal attitude.