An LED bulb and a method of making the same are disclosed. The LED bulb comprises a substrate provided with at least one LED chip, a lamp cover, a metal connector and a plastic lamp housing. The plastic lamp housing is intergrally formed, has high surface impedance (insulation) and may be formed by injection molding. The joint of the plastic lamp housing and the substrate is provided with at least one hole, and metal can be buried into the hole so as to promote heat conduction of plastic radiating fins to the substrate. High thermally-conductive plastics with high surface impedance is used as the lamp housing, such that an LED drive element can transfer heat to the thermally-conductive plastic lamp housing in a manner where heat is transferred by contacting or through air, without being wrapped by plastic cement, and the inner side of the plastic lamp housing is made of thermally-conductive plastic cement rather than metal, thereby achieving the effects of promoting heat dissipation of the LED drive element and prolonging service life and security. And because of being made of the plastic cement, the plastic lamp housing is easy to process and form and is light, and costs and price can also be reduced.