A range image sensor 1 is provided with a semiconductor substrate 1A having a light incident surface 1BK and a surface 1FT opposite to the light incident surface 1BK, a photogate electrode PG, first and second gate electrodes TX1, TX2, first and second semiconductor regions FD1, FD2, and a third semiconductor region SR1. The photogate electrode PG is provided on the surface 1FT. The first and second gate electrodes TX1, TX2 are provided next to the photogate electrode PG. The first and second semiconductor regions FD1, FD2 accumulate respective charges flowing into regions immediately below the respective gate electrodes TX1, TX2. The third semiconductor region SR1 is located away from the first and second semiconductor regions FD1, FD2 and on the light incident surface 1BK side and has the conductivity type opposite to that of the first and second semiconductor regions FD1, FD2.