An inspection system for inspecting a composite material member formed of a composite material has a main body part; an ultrasonic probe connected with the main body part and configured to contact the main surface; an optical sensor part connected to the main body part to be movable in a first direction; and a processor. The ultrasonic probe is configured to input ultrasonic wave to the main surface of the composite material member and to receive reflection wave generated from the ultrasonic wave reflected by the composite material member. The optical sensor part is configured to emit sensor light in a second direction orthogonal to the first direction, and to receive reflection light generated from the sensor light reflected on the intersection surface. The processor is configured to output a measurement result based on the reflection wave and the reflection light.