A photoelectric conversion device having a laminated structure includes: an anodized substrate constituted by a metal substrate mainly containing aluminum and an anodized film formed on the metal substrate; a lower electrode mainly containing molybdenum; a semiconductor photoelectric conversion layer generating current when absorbing light; an upper electrode; a metal supply layer being formed in contact with or inside the lower electrode, containing an alkali and/or alkaline earth metal element, and supplying the alkali and/or alkaline earth metal element to the photoelectric conversion layer during formation of the photoelectric conversion layer; and a diffusion barrier layer being conductive and formed between the anodized substrate and the metal supply layer in contact with the lower electrode and/or the metal supply layer or inside the lower electrode, and suppressing diffusion, into the anodized substrate, of the alkali and/or alkaline earth metal element from the metal supply layer.