Four new species belonging to the genus Chaetocladius, known to occur in Italy, are here described as adult males: C. aedeagovirgatus sp. nov., C. subalpinus sp. nov., C. ticinoi sp. nov., and C. valdostanus sp. nov. C. aedeagolobatus is characterized by a robust aedeagal lobe, C. subalpinus and C. valdostanus by a characteristic inferior volsella, C. ticinoi by a tubercle on the basis of gonostylus. Geographical distribution of the other species known to occur in Italy is given. A key to adult males is presented.