To provide a technique with which an operator, when talking into a microphone, can recognize whether or not his/her voice is being output from a speaker in a scan room, a CT apparatus 1 has: an operator microphone 41 installed in an operation room R2 for receiving a voice of an operator 81; a patient microphone 2 installed in a scan room R1 for receiving a voice of a patient 80; a speaker 50 installed in the operation room R2 for outputting the voice of the patient 80 received by the patient microphone 2; a speaker 5 installed in the scan room R1 for outputting the voice of the operator 81 received by the operator microphone 41; and a light-emitting section 31 for informing, in the case that the patient microphone 2 has received the voice of the operator 81 output from the speaker 5, the operator 81 that his/her voice is being output from the speaker 5.