A sliding door system having a front side forming a façade, a rear side, a left side, and a right side, the system comprising: - a central door disposed on the front side of the system, the central door being adapted to slide in the direction of the left side of the system and in the direction of the right side of the system, - a pair of side doors (105, 106) disposed on the rear side of the system, with one of the side doors being adapted to slide from the left side of the system in the direction of the right side, with the other side door being adapted to slide from the right side of the system in the direction of the left side, - a pair of pulleys (601, 602) disposed on a rear face of the central door orientated towards the rear side of the system, with one of the pulleys being disposed on a left side of the central door, with the other pulley being disposed on a right side of the central door, - a cord disposed in a loop on the pair of pulleys, in such a way that the cord has two parallel sections (608, 609), one above the other, between the pair of pulleys, - a pair of coupling devices (610, 611), one of the coupling devices connecting one of the side doors to one of the two cord sections, with the other coupling device connecting the other side door to the other cord section, characterised in that: - the side doors each include a hidden edge upright (503, 504) located behind the central door seen from the front side of the system, with the one and the other coupling device being at least partially mounted on the hidden edge upright of one of the side doors and on the hidden edge upright of the other side door, respectively, and - the one and the other coupling device include: a mounting support (612, 615) that can be fixed to the hidden edge upright of the one and the other side door, respectively, and - a cord guide (613, 616) adapted to be engaged with the cord, with the cord guide adapted to be removably fixed to the mounting support, the cord guide comprising a cord passage (614, 617) arranged in such a way that a portion of the cord is sandwiched between the mounting support and the cord guide. - a central door disposed on the front side of the system, the central door being adapted to slide in the direction of the left side of the system and in the direction of the right side of the system, - a pair of side doors (105, 106) disposed on the rear side of the system, with one of the side doors being adapted to slide from the left side of the system in the direction of the right side, with the other side door being adapted to slide from the right side of the system in the direction of the left side, - a pair of pulleys (601, 602) disposed on a rear face of the central door orientated towards the rear side of the system, with one of the pulleys being disposed on a left side of the central door, with the other pulley being disposed on a right side of the central door, - a cord disposed in a loop on the pair of pulleys, in such a way that the cord has two parallel sections (608, 609), one above the other, between the pair of pulleys, - a pair of coupling devices (610, 611), one of the coupling devices connecting one of the side doors to one of the two cord sections, with the other coupling device connecting the other side door to the other cord section, characterised in that: - the side doors each include a hidden edge upright (503, 504) located behind the central door seen from the front side of the system, with the one and the other coupling device being at least partially mounted on the hidden edge upright of one of the side doors and on the hidden edge upright of the other side door, respectively, and - the one and the other coupling device include: a mounting support (612, 615) that can be fixed to the hidden edge upright of the one and the other side door, respectively, and - a cord guide (613, 616) adapted to be engaged with the cord, with the cord guide adapted to be removably fixed to the mounting support, the cord guide comprising a cord passage (614, 617) arranged in such a way that a portion of the cord is sandwiched between the mounting support and the cord guide. - a cord guide (613, 616) adapted to be engaged with the cord, with the cord guide adapted to be removably fixed to the mounting support, the cord guide comprising a cord passage (614, 617) arranged in such a way that a portion of the cord is sandwiched between the mounting support and the cord guide.