PROBLEM TO BE SOLVED: To provide a polyester multifilament mixed yarn, a fabric, a method for producing a polyester multifilament mixed yarn, and a method for producing a fabric, which can give a feeling of swelling and softness like natural fibers. SOLUTION: In a polyester multifilament mixed yarn 1 formed by entwining at least two kinds of polyester multifilament yarns having different heat shrinkage rates, two kinds of polyester multifilament yarns are a false twisted yarn 10 and a partially drawn yarn 20. Yes, both threads are dry and heat-shrinked. [Effect] Although the overall shrinkage is large due to heat shrinkage, there are places where the amount of shrinkage is locally different, and both yarns are unevenly exposed to the outside. The non-uniformity of the degree of dyeing due to the difference in the amount of shrinkage in the longitudinal direction of the mixed fiber yarn and the non-uniformity of the degree of dyeing due to the difference in the degree of orientation of both yarns are combined to form the longitudinal direction of the mixed fiber yarn after dyeing. A non-uniform texture is formed in the fabric, and the fabric has a color and texture similar to those of natural fibers. [Selection diagram] Fig. 4
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