Abstract: A folding box for products such as pastries and cakes comprises a base which receives the product to be packaged and which is bordered by two main flaps and two secondary flaps. Each main flap is extended by a limb connected to the body of the flap by a folding line forming an articulation. Two slits are cut into each main flap and straddle the folding line. Each secondary flap terminates in a locking strip having a head and two side notches for entering the slits.