A punching apparatus (1) comprises a punch holder (2) and a punching tool (3; 13; 23); the punch holder (2) comprises a guiding body (4) provided with a mounting cavity (5) suitable to slidably receive the punching tool (3; 13; 23) and a driving assembly (6) connected to said guiding body (4) and provided with a beating element (7; 17) having a first connecting end (9; 19) coupled to a second connecting end (32; 42; 52) of the punching tool (3; 13; 23) by means of a threaded coupling that enables a relative rotation for a linear movement of the punching tool (3; 13; 23) with respect to said beating element (7; 17) along an adjustment stroke (C); the punching apparatus comprises a stopping element (10) having a first end (11) fixed inside a connecting cavity (15; 45) made in one of said connecting ends (9; 42) and arranged to receive the remaining connecting end (32; 19) and a second end (12) inserted into a stopping cavity (34; 24; 54) of said remaining connecting end (32; 19) and sliding inside the stopping cavity (34; 24; 54); the second end (12) of the stopping element (10) is provided with first stopping means (22) arranged to abut second stopping means (35; 25) provided at an opening of said stopping cavity (34; 24; 54) so as to prevent the stopping element (10) from disengaging from said stopping cavity (34; 24; 54) and to stop the adjustment stroke (C) of the punching tool (3; 13; 23).