Because acrylic fiber is excellent in heat retention, it is often used for clothing applications such as sweaters and underwear. Specifically, a lightweight bulky feeling can be obtained by blending a shrinkable acrylic fiber and increasing air gaps between fibers, but there is a disadvantage that pilling is likely to occur. Although there are some proposals on this point, it has not been possible to achieve both sufficient lightweight bulkiness and practical anti-pillability. An object of the present invention is to provide an acrylic spun yarn and a fabric which are compatible with light weight bulky feeling and anti-pilling property. The present invention is a spun yarn containing an acrylonitrile fiber A and an acrylonitrile fiber B, wherein the single fiber fineness after the boiling water treatment of the acrylonitrile fiber A is 0.3 to 1.7 dtex, the single fiber elongation is 50% Or more, the single fiber fineness after the boiling water treatment of the acrylonitrile fiber B is 0.3 to 2.2 dtex, and the single fiber elongation is 30% or less, and a fabric containing the spun yarn .
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