An electronic transaction device, comprising a chip card reader and a shut-off mechanism for shutting off a slot for an introduction of a chip card as far as said card reader, said slot being formed by at least two lateral guide rails for guiding said chip card,
- characterised in that said mechanism comprises a first shut-off flap and a second shut-off flap for shutting off said slot, said shut-off flaps being able to adopt a closed position preventing a non-compliant object from being introduced into said slot as far as said chip card reader, and an open position allowing said chip card to be introduced into said slot as far as said chip card reader;
- and
- in that said shut-off flaps each comprise an actuating element which is situated respectively in a vicinity of one of said two lateral guide rails of said slot, and in that said first flap moves from said closed position to said open position in a first direction and in that said second flap moves from said closed position to said open position in a second direction, opposite said first direction.