The invention relates to a mobile air-conditioner which can be moved freely and conveniently, and can arrange pipes between an outdoor unit easily before/after transport to be convenient for users. The air-conditioner has the following effects: by moving the main body freely, the air-conditioner is convenient for users, and before/after moving the main body (100), when pipes between an outdoor unit are arranged, an inner tube (140) can be combined with an outer tube (150) of the main body (100) via a coupling member (160) easily.