A communication converter converts a communication system and/or a communication protocol to enable communications to be performed between medical equipment and a medical control device for controlling the medical equipment, and includes: a primary substrate on which a control unit for controlling the communication converter is arranged； n (n indicates any integer) pieces of secondary substrate electrically isolated from the primary substrate and the housing of the communication converter； and n (n indicates any integer) pieces of grounding switch unit corresponding to each of the n pieces of secondary substrate for switching the grounding state of the secondary substrate.
