Apparatus for reactivating adhesive substances previously deposited on one or more parts of shoes (8), of the type comprising at least one heating device (4,5) of said one or more parts of shoes (8) and at least one controlling unit regulating the operating conditions of said at least one heating device (4,5). The apparatus includes, furthermore, one or more sensors (11) for the detection of the conditions of temperature and/or humidity of the aforesaid one or more parts of shoes (8), said one or more sensors (11) being located either upstream and/or downstream of the aforesaid at least one heating device (4,5) of the parts of shoes (8).