A shelter roof assembly mountable to a wall in such a way as to project from said wall, defining an upper side and a lower side below which a shelter region defined, wherein said shelter roof assembly comprises: - a glass plate, which extends planarly defining a plate plane comprising a top plate face and a lower plate face parallel to the plate plane, wherein the plate in the upper plate face comprises at least one plate housing; - a support device comprising a base fixable on the wall, an upper wing and a lower wing extending from said base identifying a cavity therebetween, in which a portion of the plate can be inserted, in which the upper wing has at least one device housing formed in a position in which, with the plate inserted in the support device, the plate housing and the device housing are facing; - locking means engaging the plate and the support device comprises a locking device comprising: i) an upper jib comprising a device portion extending in height having at least the cross section of a shape substantially complementary to the device housing; said locking device is characterized by further comprising: ii) a lower jib comprising a slab portion extending in height having a shape substantially complementary to the plate housing; wherein both the upper jib and the lower jib respectively comprise two positioning surfaces (518, 528) arranged on the two opposite sides inclined in mutually opposite direction so that they create two compartments therebetween; iii) two positioning members housed in said compartments which engage the respective positioning surfaces (518, 528) in such a way to be able to perform an action thereon; iv) control elements extending in length between the two jibs to engage the two positioning members operable to command a mutual position in a direction parallel to the plate plane and involving a movement in the orthogonal direction of the two jibs. - a glass plate, which extends planarly defining a plate plane comprising a top plate face and a lower plate face parallel to the plate plane, wherein the plate in the upper plate face comprises at least one plate housing; - a support device comprising a base fixable on the wall, an upper wing and a lower wing extending from said base identifying a cavity therebetween, in which a portion of the plate can be inserted, in which the upper wing has at least one device housing formed in a position in which, with the plate inserted in the support device, the plate housing and the device housing are facing; - locking means engaging the plate and the support device comprises a locking device comprising: i) an upper jib comprising a device portion extending in height having at least the cross section of a shape substantially complementary to the device housing; said locking device is characterized by further comprising: ii) a lower jib comprising a slab portion extending in height having a shape substantially complementary to the plate housing; wherein both the upper jib and the lower jib respectively comprise two positioning surfaces (518, 528) arranged on the two opposite sides inclined in mutually opposite direction so that they create two compartments therebetween; iii) two positioning members housed in said compartments which engage the respective positioning surfaces (518, 528) in such a way to be able to perform an action thereon; iv) control elements extending in length between the two jibs to engage the two positioning members operable to command a mutual position in a direction parallel to the plate plane and involving a movement in the orthogonal direction of the two jibs. i) an upper jib comprising a device portion extending in height having at least the cross section of a shape substantially complementary to the device housing; said locking device is characterized by further comprising: ii) a lower jib comprising a slab portion extending in height having a shape substantially complementary to the plate housing; wherein both the upper jib and the lower jib respectively comprise two positioning surfaces (518, 528) arranged on the two opposite sides inclined in mutually opposite direction so that they create two compartments therebetween; iii) two positioning members housed in said compartments which engage the respective positioning surfaces (518, 528) in such a way to be able to perform an action thereon; iv) control elements extending in length between the two jibs to engage the two positioning members operable to command a mutual position in a direction parallel to the plate plane and involving a movement in the orthogonal direction of the two jibs.