An electrical connector is adapted to be alternatively connected to an audio plug or another device plug. The electrical connector includes a hollow insulating main body having an insertion opening that has an audio insertion portion corresponding in shape to the audio plug and a main insertion portion corresponding in shape to the another device plug, a main terminal module including main terminals partially exposed in a receiving space of the insulating main body for electrical connection with the another device plug, and an audio terminal module including audio terminals partially exposed in the receiving space for electrical connection with the audio plug.