An electrical connector includes an insulative housing having a tongue portion, and two rows of terminals reversely-symmetrically arranged at opposite faces of the tongue portion. Each row of terminals include a grounding terminal and a power terminal arranged at a first district, and at least one subsidiary terminal arranged at a second district connecting the first district. Each row of terminals lack of at least two terminals to thereby form a vacant space between the grounding terminal and the power terminal. The subsidiary terminals in the two rows are offset with each other along an up-to-down direction.