An optical switch includes: at least a light transmission portion, an
optical path-changing portion and an actuator portion. The light
transmission portion has a light reflecting plane and light transmission
channels having optical wave guiding bodies provided in at least three
directions. The optical path-changing portion is proximate the light
transmission portion in a movable condition and is made to contact or
separate from the light transmission portion. An optical path where light
input to the light transmission channels is totally reflected in the light
transmission portion and is transmitted to a specific light transmission
channel on an output side, is switched to another optical path where light
input to the light transmission channel is taken to the light introduction
member, and is totally reflected at the light reflection member and is
transmitted to a specific light transmission channel on the output side.
