Abstract: Disclosed is a seamless bias fabric manufacturing apparatus using tubular fabric, the apparatus including: a guide means having a pair of guide bars for guiding tubular fabric woven such that an angle between a warp and a weft is 90 degrees; a cutting means having a disk-shaped cutting blade for cutting one radial side of the tubular fabric in an inclined direction with respect to a progress direction of the tubular fabric guide by the guide means; and a winding means having a winding roller for continuously guiding the tubular fabric through the guide means while rotating the tubular fabric and winding the bias fabric cut by the cutting means.