In the coffee machine (1) exhibiting a selective loading device of a coffee capsule into an infusor, the loading device comprises at least an advancement line (L) exhibiting at least a motorized conveyor screw (11) for step movement of at least a stack (6) of capsules (7, 9) along a support and guide channel (14) of the advancement of the stack (6) of capsules (7, 9) towards a release section (8), and manual command means for enabling the advancing by a step of said at least a stack of capsules (7, 9), the channel (14) exhibiting, at an upper side thereof, windows (16) having a complementary shape to the capsules (7, 9) for introduction thereof with a compulsory orientation suitable for correct use with the conveyor screw (11).