the engagement of the basic body 21 and the lid 22 can be undone in that a compressive force is exerted on the locking section 26 against the action of the resilient force and the projection is removed from the eyelet fig3 shows the holding device 1 of the invention the insert 3 being inserted into the basic body 21 of the housing 2 the insert 3 is arranged in the basic body 21 of the housing 2 such that the flexible means 33 are each arranged on the edge of each pipe receiving means 31 oriented towards the hinge in the condition in which the lid 22 is opened each flexible means 33 is spread apart from the insert 3 such that the insertion slot of each pipe receiving means 31 is exposed over about the whole cross section of the semicircular holding section of each pipe receiving means 31 and a pipe 4 is insertable in the inserted state of the insert 3 the abutment projections 3 project as shown in fig3 at the abutment side of the housing 2 out of the housing 2 fig4 shows the holding device 1 according to the invention in the closed state of the lid 22 which is locked with respect to the basic body 21 of the housing 2 the locking section 26 with projection is in engagement with the locking section 25 with eyelet so that the lid 22 cannot be moved relative to the basic body 21 the pipes 4 are fixed secured in position in the respective pipe receiving means 31 the flexible means 33 of each pipe receiving means 31 being bent such that it fully spans the insertion slot of the pipe receiving means 31 and.