The invention relates to a tool chucking device, especially an oscillation tool chucking device, comprising at least one chucking unit (12a; 12b) which has at least one pin-type chucking element (14a; 14b) for clamping a treatment tool (16a; 16b) in an axial direction (18a; 18b) and at least one grip head (20a; 20b) arranged on the chucking element (14a; 14b). According to the invention, the tool chucking device comprises at least one movement conversion unit (22a; 22b) which is designed to displace at least the grip head (20a; 20b) at least substantially along the axial direction (18a; 18b) into at least one direction different from the axial direction (18a; 18b) depending in the movement of the chucking element (14a; 14b).