The invention provides a photoelectric conversion element including a photoelectric conversion film excellent in vapor deposition suitability and exhibiting excellent photoelectric conversion efficiency in a case where the photoelectric conversion film is a thin film, an optical sensor, an imaging element, and a compound. The photoelectric conversion element of the embodiment of the invention includes a conductive film, a photoelectric conversion film, and a transparent conductive film, in this order, in which the photoelectric conversion film contains a compound represented by Formula (1).