A solar battery module device comprising: a solar cell module formed by arranging a plurality of solar battery cells; a rack-shaped frame having a substantially rectangular shape with a pair of opposite long-side frames, and a pair of short-side frames coupled between both ends of the long-side frames; each long-side frame having a plane-shaped frame main body (1 a) extended to a direction perpendicular to the solar cell module and a module supporting unit (1 b) extended from an edge of the frame main body (1 a) at a side of the solar cell module to the inside of the rack-shaped frame and supporting the solar cell module, the rack-shaped frame supporting an outer-edge portion of the solar cell module by surrounding a whole periphery of the outer-edge portion; and a reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) that is bridged over between two opposite sides of the rack-shaped frame, and supports the solar cell module by being brought into contact with a back surface of the solar cell module when the solar cell module is bent, characterized in that notches into which the reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) is inserted are provided on the back surface of the long-side frames of the rack-shaped frame by having internal flanges formed by being extended from the frame main body at an opposite side of the module supporting unit to the inside of the rack-shaped frame of the two opposite long-side frames notched by only the width of the reinforcing frame (3, 3B, 3C, 3D, 3E, 3F, 3G), and a vertical-movement locking unit (1e, 1g, 1h) is provided inside the rack-shaped frame that and restricts a vertical movement of the reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) to a direction of the solar cell module by being brought into contact with the reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) when the reinforcing frame (3, 3B, 3C, 3D, 3E, 3F, 3G) is inserted into the notches. a solar cell module formed by arranging a plurality of solar battery cells; a rack-shaped frame having a substantially rectangular shape with a pair of opposite long-side frames, and a pair of short-side frames coupled between both ends of the long-side frames; each long-side frame having a plane-shaped frame main body (1 a) extended to a direction perpendicular to the solar cell module and a module supporting unit (1 b) extended from an edge of the frame main body (1 a) at a side of the solar cell module to the inside of the rack-shaped frame and supporting the solar cell module, the rack-shaped frame supporting an outer-edge portion of the solar cell module by surrounding a whole periphery of the outer-edge portion; and a reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) that is bridged over between two opposite sides of the rack-shaped frame, and supports the solar cell module by being brought into contact with a back surface of the solar cell module when the solar cell module is bent, characterized in that notches into which the reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) is inserted are provided on the back surface of the long-side frames of the rack-shaped frame by having internal flanges formed by being extended from the frame main body at an opposite side of the module supporting unit to the inside of the rack-shaped frame of the two opposite long-side frames notched by only the width of the reinforcing frame (3, 3B, 3C, 3D, 3E, 3F, 3G), and a vertical-movement locking unit (1e, 1g, 1h) is provided inside the rack-shaped frame that and restricts a vertical movement of the reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) to a direction of the solar cell module by being brought into contact with the reinforcing frame (3; 3B; 3C; 3D; 3E; 3F; 3G) when the reinforcing frame (3, 3B, 3C, 3D, 3E, 3F, 3G) is inserted into the notches.