A glass tube cleaning and cutting device (10; 20) and a method for same configured to cut a continuous glass tube (G1) at a predetermined length (L) by intermittently contacting a cutting blade (16) with the outer circumference surface of the continuously travelling continuous glass tube (G1) formed by tube pulling while blowing air (A1) to impose scratches and thermal shock on the outer circumference surface of the continuous glass tube (G1) so as to obtain a plurality of cut-off glass tubes (G2), the glass tube cleaning and cutting device (10, 20) includes: a blower (2) provided on a more downstream side of the travelling continuous glass tube (G1) than the cutting blade(16), the blower (2) being configured to blow opposing air (A2) opposed to air (A1) into a tip end opening (F1) of the continuous glass tube (G1).