Abstract: A phototherapy device comprises includes a translucent insulating carrier, and an illuminant module disposed inside the translucent insulating carrier, where in the illuminant module comprises a circuit board, a power supply unit, a switch, and at least one light emitting diode, wherein the power supply unit, the switch, and the light emitting diode coupled to the circuit board and electrically connected to each other. Therefore, it is more convenient to carry the phototherapy device due to the volume of the phototherapy device is reduced, and reduces cost effectively. Also, the phototherapy device adopts the SMD (Surface Mount Device) design to be suitable for attaching on the skin, and provides more choice to the consumers.