A dental diagnosis device has an occlusion sound detection member that detects occlusion sounds by teeth and an analysis member that analyzes the teeth occlusion based on detected occlusion sounds by the occlusion detection member. The occlusion detection member comprises a sucker shaped suction member that sticks to a tooth, a hollow passage connected to a through-hole installed in the suction member and it is operably controlled to appropriate negative pressure by which the suction member is adhered to a tooth, and a detection member connected to the suction member, which detects occlusion sound via the suction member.
