A lamp holder for holding a lamp and supplying power into the lamp includes a pair of pins for connecting with a power supply, a pair of electric leads for connecting with the lamp, a wire clamp, and a base for accommodating the wire clamp and securing the pair of pins. The wire clamp comprises an upper wire clamp and a lower wire clamp, a pair of pinholes is defined in the upper wire clamp, and another pair of pinholes is defined in the lower wire clamp, a groove connected with each pinhole for accommodating a tail end of each electric lead is defined in the upper wire clamp, and a through opening corresponding to each groove is defined in the lower wire clamp. When the pair of electric leads passes through the pair of through openings and reaches the pair of grooves, and the pair of pins passes through the pair of pinholes, then each electric lead and each pin are electrically connected.