A LED bulb comprises: a lamp-seat capable of connecting an external power supply, a lampshade fixed above the lamp-seat, and a circuit board mounted in the lamp-seat and the lampshade. The bottom end of the circuit board is electrically connected to the lamp-seat, and the top end defines a first portion provided for setting the upper-emitting light-source module. The circuit board has a second portion with a width gradually downwardly widened, and the second portion is set with an oblique-upper emitting light-source module. The circuit board is connected to a third portion, and the third portion has a width gradually narrowed downwardly, and the third portion is set with an oblique-lower emitting light-source module. The light-source modules are composed of a plurality of LED arrays and are suspended inside the lampshade, so they are compatible with the specification requirements of the United Nations Economic Commission for Europe's automotive Regulations.