A photosensor includes a sensor module (5) in which emitter leads (20, 22) and receiver leads (24, 26) protrude from a circuit-encapsulating portion (90) in a direction intersecting with a direction (Y) in which an external connecting terminal (50) extends. The photosensor includes a light emitter (10), a light receiver (15), a circuit-encapsulating portion (90), a connecting terminal (50), first and second emitter leads (20, 22), and first and second receiver leads (24, 26). When the connecting terminal (50) extends in a first direction (Y), and a first plane (X,Y) is parallel to the first direction, the first and second emitter leads (20, 22) protrude from the circuit-encapsulating portion (90) in a direction parallel to the first plane (X,Y) and intersecting with the first direction (Y), and extend opposite to the first direction. The first and second receiver leads (24, 26) protrude from the circuit-encapsulating portion (90) in the direction parallel to the first plane (X,Y) and intersecting with the first direction (Y) and opposite to a direction in which the first and second emitter leads protrude, and extend opposite to the first direction. The first and second emitter leads (20, 22) and the first and second receiver leads (24, 26) are deformed to allow the light receiver (15) and the light emitter (10) to face each other.