NOVELTY - The apparatus (1) has condensing lens array (10) that is configured by arranging condensing lenses (11) to row and column directions (DX,Dy). Thermal-diffusion plate (30) with a mounting substrate (21) diffuses heat from mounting substrates. The thermal-diffusion plate faces condensing lenses arranged at row direction. The size (SPx) in row direction of thermal-diffusion plate is more than double the size (SLx) in each row direction of condensing lenses. The size (SPy) in column direction of plate is smaller than size (SLy) in each column direction of condensing lenses.    USE - Concentrating solar power generation apparatus installed in rooftop.    ADVANTAGE - Thermal radiation characteristic of concentrating solar power generation apparatus can be improved and temperature rise of the solar cell element can be suppressed effectively by providing the thermal-diffusion plate which mounted solar cell element. The output fall by the temperature rise of the solar cell element can be suppressed and high photoelectric conversion efficiency can be obtained effectively. The concentrating solar power generation apparatus excellent in heat dissipation with sufficient productivity can be manufactured with reduced cost effectively. Insulation of the mounting substrate can be achieved reliably, and the insulation between solar cell elements can be ensured highly. The connection conductor contacting to another electro-conductive region can be prevented, so that the reliability of the connection between solar cell elements can be improved.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacturing method of concentrating solar power generation apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a top view of the concentrating solar power generation apparatus.    Concentrating solar power generation apparatus (1)    Condensing lens array (10)    Condensing lenses (11)    Mounting substrate (21)    Thermal-diffusion plate (30)    Row direction (Dx)    Column direction (Dy)    Sizes of condensing lenses (SLx,SLy)    Sizes of thermal-diffusion plates (SPx,SPy)