NOVELTY - The apparatus has a photoelectric conversion element (7) provided on an element mounting substrate (5), and a frame (10) surrounding the photoelectric conversion element on the element mounting substrate. A condensing member (9) is provided above the photoelectric conversion element while joining to the frame. A radiation fin (11) provided on the element mounting substrate is spaced apart from the frame by positioning on an outer side of the frame. Heat conductivity of the radiation fin is set larger than heat conductivity of the frame.    USE - Photoelectric conversion apparatus i.e. solar cell apparatus for a photoelectric conversion module (claimed) i.e. solar power generation module used in electric power generation.    ADVANTAGE - The radiation fin provided on the element mounting substrate is spaced apart from the frame by positioning on the outer side of the frame to thermally radiate surrounding heat of the photoelectric conversion element efficiently to an exterior of the photoelectric conversion apparatus, thus suppressing temperature rise of the element mounting substrate and the photoelectric conversion element and suppressing heat conduction to the frame, and hence suppressing decline in conversion efficiency of the photoelectric conversion element. The heat retained in the element mounting substrate is suppressed, and thermal strain of the element mounting substrate by differential thermal expansion of the element mounting substrate and an external substrate is relieved, thus reducing an influence of distortion to the frame and the condensing member and reducing shift of incident angle of incident light incident on the condensing member, and hence improving light condensing efficiency. The radiation fin is adjoined to a periphery part of the photoelectric conversion element, thus reducing dimension of the element mounting substrate, and hence reducing size of the photoelectric conversion apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a photoelectric conversion apparatus.    Element mounting substrate (5)    Photoelectric conversion element (7)    Condensing member (9)    Frame (10)    Radiation fin (11)