The present invention relates to a light emitting diode-type light emitting device having a wavelength range for whitening. In particular, the light emitting device comprises: a main body (1) which has a rod shape and is made from aluminum or heat-radiating synthetic resin by extrusion molding, wherein an uneven heat-radiating fin (1a) is formed continuously integrally lengthwise on the outer surface of the main body (1)； an LED (2) having a fixed amount of light, which is installed and fixed in one end portion of the main body (1), and which irradiates an object with the light in a fixed wavelength range corresponding to the driving signal being supplied from an LED (2) driving circuit part for a fixed period of time； a lens (3) which is screw-joined attachably/detachably to the front portion of the LED (2) at one end portion of the main body (1), and which allows the light generated from the LED (2) to be applied in a fixed irradiation angle； an LED driving circuit part which is installed in the main body (1) and controls the driving of the LED (2)； a power supply part which is installed inside or outside the main body (1), and which supplies the source voltage required for the driving of the LED driving circuit part and the LED (2)； an operating switch (6) which is installed and fixed to the outside of the main body (1) and which allows a user to control the driving of the LED (2)； and a heat-radiating silicon tube (7) which is installed to cover one portion of the other outer side of the main body (1), and which prevents the heat of LED radiating through the main body (1) from being transferred to a user's hands while preventing the user's hands from being slid from the main body (1). Therefore, the light emitting device is easy to carry, and people are able to use the light emitting device conveniently and comfortably regardless of place for tooth whitening or freckle removal, etc., thereby increasing product usability and compatibility.본 발명은 미백 파장대를 갖는 발광다이오드형
