There is described a method of mounting inserts, comprising the following steps: •(i) Application of an adhesive film on one of the faces of an inserts tray (223) covering a plurality of through-holes (241) and respective depressions (242); •(ii) Insertion of an insert (230) in each through-hole (241) of the tray (223) from a face of the inserts tray (223) opposite that of the adhesive film, securing one surface of the insert (23) onto this adhesive film; •(iii) Cutout of the adhesive film forming a plurality of single films (245) associated with the inserts (230). There is further described an insert mounting device (300), comprising a holding table (314) held by a supporting base (311), the insert mounting device (300) further comprising a rotating tray holder (312), cooperating with a cutting system (313).