Abstract: The present invention relates to a tape attaching device used in attaching a tape to a car door sash, instead of painting. Tape attaching device comprises a drum block 2 having pressure drums 4, 6 and guide bars 8, 10, a drum cap 12 for adjusting the length of the pressure drums 4, 6 and guide bars 8, 10, an inner roller block 16 having a plurality of inner rollers 18 facing the pressure drums 4, 6 and mounted to a block housing 14 together with the drum block 2 so as for space to be adjusted, a slide support 22 mounted so as for space to be adjusted in the same direction as that of the inner roller block 16, and an outer roller block 26 mounted to the slide support 22 so as for height to be adjusted and having a plurality of outer rollers 24. It can apply to all kinds of car by simply adjusting the space between the pressure drums 4, 6 and inner and outer rollers 18, 24 and the height of outer rollers 24 according to the width and sectional shape of attaching surface of door sash portion 50.