Provided is a lipolysis device using a low power laser, and more particularly, to a lipolysis device using a low power laser capable of non-invasively irradiating skin with a laser beam which may or may not be condensed through a lens or transparent window to obtain the same effect as lipolysis of adipose tissue exposed through incision using a conventional ultrasonic or low power laser. In addition, the lipolysis device includes a vacuum suction means to readily discharge liquefied fat discharged from an adipose cell and concentrated in a space between cell tissues through the groin area, where lymphatic vessels are abundant, and out of the body. Further the lipolysis device can stably contact human skin to break down fat and thus is convenient to use. Furthermore, the lipolysis device can break down subcutaneous fat by irradiating an abdominal region with a low power laser without skin damage or surgical operation, thereby effectively removing abdominal fat.