To provide a lens shape and a cell structure by which the eccentricity of a lens fixed to have a specified positional relation at the inside of a cell is suppressed so as to be very small and the intervals of a plurality of lenses arrayed in an optical axis direction at the inside of the cell are set to have a desired relation and which contribute to resource-saving and the reduction of waste by reducing the number of parts.

In a lens holding device having one or more lenses 1 and a lens barrel 2 holding the outer peripheral part of the lens by an inner wall, inclined parts 2-1 respectively inclined in the optical axis direction are provided at the outer peripheral part 1-1 of the lens and the inner wall of the lens barrel, and the inclined part of the outer peripheral part of the lens is engaged with the inclined part of the inner wall of the lens barrel, so that the lens is held.