Provided is a weft-knitted fabric having excellent stretchability, and providing excellent comfort in a hot environment. The weft-knitted fabric contains non-elastic fibres and elastic fibres, and is characterised: by being formed of a mesh part where a stitch of a welt structure and a stitch of a knit structure are alternately repeated to complete one course, and the course having the same structural arrangement is employed once or continuously repeated twice, and a plain-knit part where a course of an all-knit structure is employed once or continuously repeated up to three times; and in that said mesh part and said plain-knit part are each alternately arranged in the longitudinal direction.