Abstract: An automatic faucet that is easy to use with a sensor window that can be easily cleaned and a sensor that is suppressed from falsely detecting water stream ejected from a water spout member. An automatic faucet, which has a water spout member and a sensor placed in a front end section of a water spout pipe and automatically ejects water from the spout member by the detection by the sensor. The water spout member and the sensor are axially inserted into the water spout pipe from the obliquely downward opening of the tip of the water spout pipe, and the sensor is disposed above the water spout member. The water spout member is disposed in a state where the front end face thereof is positioned to the inside of the water spout pipe than the front end face of the sensor.

Abstract: An automatic faucet, which has a water spout member and a sensor placed in a front end section of a water spout pipe and automatically ejects water from the spout member by the detection by the sensor. The water spout pipe has a shape, in which a section of the front end side is directed forward and obliquely downward with respect to a user. The water spout member and the sensor are axially inserted into the water spout pipe from the obliquely downward opening of the tip of the water spout pipe, and the sensor is disposed above the water spout member. The water spout member is disposed in a state where the front end face thereof is positioned to the inside of the water spout pipe than the front end face of the sensor.

Abstract: A cylindrical water spout member is provided inside the tip section of the water spout pipe, the optical fiber on the light projection side and the optical fiber on the light receiving side are passed inside the water spout pipe up to the tip section of the water spout pipe, and the tips of the optical fibers configure a light projection section and a light receiving section. Moreover, fitting convex section are provided on the outer surfaces of the tip sections of the optical fibers, and the fitting concave sections are provided on the outer surface of the water spout member. The tip sections of the optical fibers are fixed in a positioned state based on the concave-convex fitting.