Board-to-board connector

A board-to-board connector adapted for being soldered to a printed circuit board, comprising:

• an insulating housing having a base board and four sidewalls extending downward from the base board, two ends of a top of a first pair of the four sidewalls respectively defining two fixing slots spaced away from each other;
• two U-shaped soldering members each respectively having a soldering plate disposed on the top of the first pair of sidewalls for being soldered to the printed circuit board, two opposite ends of the soldering plate extending inwardly and bending downwardly to form a pair of fixing portions respectively fastened in the corresponding fixing slots, each of the fixing portions protrudes outwardly to form at least one fixing lump abutting against an inside of a respective one of the fixing slots, an outside of each of a second pair of the four sidewalls defines a gap vertically passing therethrough, one side of the soldering plate covers the corresponding gap and defines a plurality of spillway cavities communicating with the corresponding gap;
• and
• a plurality of electrical terminals disposed in the insulating housing and located between the two soldering members for being soldered to the printed circuit board.