PROBLEM TO BE SOLVED: To reduce the risk of a patient in an extracorporeal heart medical device. SOLUTION: At least one battery case having one or a plurality of battery case connection terminals 2 is provided in a housing 1 of an external heart medical instrument. This battery case is provided with at least one tray 3 having a housing portion for housing at least one battery. At least a part of the battery case connection terminal 2 is provided outside the tray 3. [Selection diagram] Fig. 5【課題】体外型心臓医療器具において、患者の危険性を低減する。【解決手段】体外型心臓医療器具の筐体１に、１つ又は複数の電池ケース接続端子２を有する少なくとも１つの電池ケースを設ける。この電池ケースに、少なくとも１つの電池を収容するための収容部を有する少なくとも１つのトレイ３を設ける。電池ケース接続端子２の少なくとも一部をトレイ３の外に設ける。【選択図】図５
