WEARABLE DEVICE

A wearable device includes a housing, a main circuit board, two magnetic components and a battery. An inside of the housing has a ring-shaped accommodating space. The main circuit board is mounted in the accommodating space. The main circuit board includes a level section, a first curving section, a second curving section and two electrode contacts. A rear edge of a free side of the first curving section is recessed inward to form a notch. A rear edge of the first curving section is recessed inward to form a first reserving space. A rear edge of the second curving section is recessed inward to form a second reserving space. The two magnetic components are mounted in the accommodating space. The battery is accommodated in the accommodating space. The battery is received in the notch.