Instant opening mechanism (100) of facade claddings that is configured as a safety element in case of emergency to allow rapid evacuation, while at the same time the preceptive safety against intruders is not sacrificed without altering the aesthetic set of the same and comprising essentially an electromagnet (102), that moves horizontally along the axis perpendicular to the axis defined by the facade, releasing a latch (103) and this a guiding claw (104), such that the complete removal of the protection through a guide (101).