A photoelectric conversion element module (1, 2, 3, 4), comprising: a plurality of photoelectric conversion elements (10, 10A, 10B) each having a first electrode and a second electrode that oppose each other, and electrolyte arranged between the first electrode and the second electrode, a sealing member connected to the first electrode and the second electrode and encompassing and sealing the electrolyte; and a conductive member electrically connecting the plurality of photoelectric conversion elements to each other, the plurality of photoelectric conversion elements being arranged in planar form, wherein the first electrode and the second electrode each have an extended portion (15a, 25a) which, when viewing the first electrode and the second electrode along a direction connecting the first electrode and the second electrode, extends to outside a region encompassed by an outer periphery of the sealing member, in adjacent photoelectric conversion elements, the conductive member connects the extended portion of the first electrode of the photoelectric conversion elements and the extended portion of the second electrode of the other photoelectric conversion element in between the sealing member of one of the adjacent photoelectric conversion elements and the sealing member of the other photoelectric conversion element, at least one of the extended portion of the first electrode and the extended portion of the second electrode has flexibility, being a thin conductive plate, among the first electrode and the second electrode, the extended portion (15a, 25a) of one electrode (15, 25) has flexibility, being a thin conductive plate, and the other electrode (15, 25) has an insulating base material on the side opposite the side of the one electrode (15, 25), and the base materials in the plurality of photoelectric conversion elements are formed integrally with each other, and the extended portion (15a, 25a) of the one electrode (15, 25) is flexed toward the side of the other electrode (15, 25). a plurality of photoelectric conversion elements (10, 10A, 10B) each having a first electrode and a second electrode that oppose each other, and electrolyte arranged between the first electrode and the second electrode, a sealing member connected to the first electrode and the second electrode and encompassing and sealing the electrolyte; and a conductive member electrically connecting the plurality of photoelectric conversion elements to each other, the plurality of photoelectric conversion elements being arranged in planar form, wherein the first electrode and the second electrode each have an extended portion (15a, 25a) which, when viewing the first electrode and the second electrode along a direction connecting the first electrode and the second electrode, extends to outside a region encompassed by an outer periphery of the sealing member, in adjacent photoelectric conversion elements, the conductive member connects the extended portion of the first electrode of the photoelectric conversion elements and the extended portion of the second electrode of the other photoelectric conversion element in between the sealing member of one of the adjacent photoelectric conversion elements and the sealing member of the other photoelectric conversion element, at least one of the extended portion of the first electrode and the extended portion of the second electrode has flexibility, being a thin conductive plate, among the first electrode and the second electrode, the extended portion (15a, 25a) of one electrode (15, 25) has flexibility, being a thin conductive plate, and the other electrode (15, 25) has an insulating base material on the side opposite the side of the one electrode (15, 25), and the base materials in the plurality of photoelectric conversion elements are formed integrally with each other, and the extended portion (15a, 25a) of the one electrode (15, 25) is flexed toward the side of the other electrode (15, 25).