[Problem] To more accurately detect motion of a hitting implement by way of a sensor. [Solution] Provided is a sensor device equipped with: a base member which is mounted to the hitting implement via an attachment structure; a substrate bonded to the base member; a sensor which is disposed upon the substrate and which detects motion of the hitting implement conveyed through the base member and the substrate; a communication unit which transmits detection results of motion of the hitting implement to an external device; and an exterior casing member which covers the sensor and the communication unit.
