A dye-sensitized photoelectric conversion element comprising: at least one dye-sensitized photoelectric conversion cell, wherein the dye-sensitized photoelectric conversion cell includes: a first electrode; a second electrode facing the first electrode; an oxide semiconductor layer provided on the first electrode; and an electrolyte provided between the first electrode and the second electrode, and characterised in that the second electrode includes: an outer portion; an approaching portion that is closer to the oxide semiconductor layer than the outer portion; and a connecting portion connecting the outer portion and the approaching portion, and the oxide semiconductor layer includes: an inner part facing the approaching portion of the second electrode on the first electrode; and an outer part that is provided around the inner part and faces the connecting portion of the second electrode, wherein the outer part includes: a plurality of linear portions separated from one another and a corner portion connecting two adjacent linear portions to each other, a thickness of the corner portion of the outer part is greater than a thickness of the linear portion of the outer part, and a thickness of the linear portion of the outer part is greater than a thickness of the inner part; and wherein a sealing portion joins the first electrode and the outer portion of the second electrode. at least one dye-sensitized photoelectric conversion cell, wherein the dye-sensitized photoelectric conversion cell includes: a first electrode; a second electrode facing the first electrode; an oxide semiconductor layer provided on the first electrode; and an electrolyte provided between the first electrode and the second electrode, and characterised in that a first electrode; a second electrode facing the first electrode; an oxide semiconductor layer provided on the first electrode; and an electrolyte provided between the first electrode and the second electrode, and characterised in that the second electrode includes: an outer portion; an approaching portion that is closer to the oxide semiconductor layer than the outer portion; and a connecting portion connecting the outer portion and the approaching portion, and an outer portion; an approaching portion that is closer to the oxide semiconductor layer than the outer portion; and a connecting portion connecting the outer portion and the approaching portion, and the oxide semiconductor layer includes: an inner part facing the approaching portion of the second electrode on the first electrode; and an outer part that is provided around the inner part and faces the connecting portion of the second electrode, wherein an inner part facing the approaching portion of the second electrode on the first electrode; and an outer part that is provided around the inner part and faces the connecting portion of the second electrode, wherein the outer part includes: a plurality of linear portions separated from one another and a corner portion connecting two adjacent linear portions to each other, a thickness of the corner portion of the outer part is greater than a thickness of the linear portion of the outer part, and a plurality of linear portions separated from one another and a corner portion connecting two adjacent linear portions to each other, a thickness of the corner portion of the outer part is greater than a thickness of the linear portion of the outer part, and a thickness of the linear portion of the outer part is greater than a thickness of the inner part; and wherein a sealing portion joins the first electrode and the outer portion of the second electrode.