An electrical connector includes a housing having a fitting opening for a mating connector, a flexible printed circuit board having electric contact elements capable of detachably fitting with the mating connector, a block embracing the flexible printed circuit board with the housing, bit inserts causing the block and the housing to be engaged with each other, and urging members for urging the flexible printed circuit board to a substrate. The housing is provided with at least two positioning pins as positioning device with respect to the block. The positioning pins are able to be slightly press-fitted in insertion apertures of the flexible printed circuit board. The block is provided with positioning apertures at locations corresponding to the positioning pins of the housing.