Abstract: The invention relates to a coded locking device actuated by successive pushes on two buttons. This device comprises means for converting the pushes on the two buttons into electrical pulses emitted respectively along two channels and an electronic unit adapted to identify the pulse trains successively emitted in the two channels, to count the numbers of pulses of the different successive trains, to compare each sequence of pulse trains with a memorized reference or code sequence and to emit an unlocking signal S if the two sequences are identical. To form each sequence of actual pulses, the user can start by pressing either one of the two buttons.