An HID lamp socket (1), which connects an HID lamp (9) with an electrical device, includes an insulative housing (10), a number of first electrical terminals (20) received in the housing and a number of second electrical terminals (30) for contacting the first electrical terminals to a number of wires (34) extending from the electrical device. The first electrical terminals include a high-voltage terminal (21), a low-voltage terminal (22) and two switch terminals (23). The switch terminal has a cantilever (231) extending transversely and slantwise and a contact tab (233) extending downwardly from the cantilever.