PURPOSE: To enhance the effectiveness in the fitting work and increase the strength where two connectors are mounted inverted up and down in the same mounting position on the two sides of a printed circuit board, enable also two connectors to be mounted overlapped on one side of circuit board, and even there enhance the effectiveness in the fitting work and increase the strength.

CONSTITUTION: The body of this connector of high density mount type is fitted with a plug part 12, a lead part 20 to be connected with the plug part, and fixing parts 30, 31 located on the right and left sides of the lead part 20. In this lead part 20 another lead 21 and a lead hole 24 are arranged symmetrically to the left and right, and detent members 35, 36 and detaining holes 37, 38 are arranged in the fixing parts 30, 31 symmetrically to the left and right.