A pin header connector having: a peripheral frame having, at the centre, a series of through openings; and a plurality of modules, each of which engages a corresponding through opening and is provided with a series of electrical pin contacts and with a support plate, which is made of a plastic material and has a series of first through holes engaged by the corresponding electrical pin contacts. The peripheral frame has a plurality of linear sliding guides, each of which is arranged in the area of a through opening, is designed to guide an insertion of the support plate of a module into the through opening allowing the support plate to only make a translation in a mounting direction, and is provided with a limit stop ending the insertion. An interlocking connection system is provided, which is activated when the support plate of each module strikes against the limit stop.