The present invention dobutamine hydrochloride containing source (Dobutamine hydrochloride) as the active ingredient cells (myoblast) the composition for promoting muscle differentiation , the medium composition for the promotion of muscle myoblast differentiation containing dobutamine hydrochloride as an active ingredient , a pharmaceutical composition for preventing or treating muscle disorders containing dobutamine hydrochloride as the active ingredient and dobutamine hydrochloride as an active ingredient including failure to provide the muscle for preventing or improving food composition .본 발명은 도부타민 염산염 (Dobutamine hydrochloride)을 유효성분으로 함유하는 근원세포 (myoblast)의 근육 분화 촉진용 조성물, 도부타민 염산염을 유효성분으로 함유하는 근원세포의 근육 분화 촉진용 배지 조성물, 도부타민 염산염을 유효성분으로 함유하는 근육 장애 예방 또는 치료용 약학조성물 및 도부타민 염산염을 유효성분으로 포함하는 근육 장애 예방 또는 개선용 식품조성물을 제공한다.