To provide a hollow plate with a fixed part which is free from a deformation such as a warp and has a superior joining strength and a high durability and a method for manufacturing the hollow plate.

This hollow plate P has a front wall 1 and a rear wall 2 spaced in between at a mutually opposed position, and the peripheral part of these walls is blocked by an end wall 3. In addition, an inner rib 4 is internally provided which has one of its end sides deposited on the rear face of the front wall 1 and the other end side formed integrally with the rear wall 2. Further, a fixed part 6 projected into one direction crossing the longitudinal direction of the inner rib 4 on the front wall side has an implanted bar-like form 5 protruded on both end parts. Besides, the tip face of the fixed part 6, i.e., the face in which a screw hole 6a is formed is exposed to the outer face of the rear wall side, and a space part 7 encircling the outer faces of both end parts of the bar-like form 5 including the fixed part 6 is formed adjacent to both ends of the inner rib 4.