A solar cell module 1a is constituted from a main frame member 10a and a sub-frame member 20a that hold a solar cell panel 9. The main frame member 10a is constituted from a main outer wall 11, a main holding upper piece 12, a main holding lower piece 13, and a main bottom piece 16 and, also, the sub-frame member 20a is constituted from a sub-outer wall 21, a sub-holding upper piece 22, a sub-holding lower piece 23, a sub-base piece 24, a sub-inner wall 25, and a sub-bottom piece 26. Then, the main bottom piece 16 and the sub-bottom piece 26 are formed so as not to collide with each other, such that the projecting position heights of the pieces are different.