Abstract: It is an object of the present invention to lessen strain dependency of hardness of a tread rubber used for a studless tire, have good performance on snow and ice while securing rigidity on non-snow roads, and improve abrasion resistance. The present invention provides a rubber composition for tread used for a studless tire comprising 30 to 150 parts by weight as a total of (1) silica with a nitrogen absorption specific surface area of at most 100 m2/g and (2) silica with a nitrogen absorption specific surface area of at least 180 m2/g based on 100 parts by weight of a rubber component in which a content of a natural rubber and/or a polybutadiene rubber is at least 80% by weight, wherein contents of silica (1) and silica (2) satisfy the formula below: [Content of silica (1)]×0.2?[Content of silica (2)]?[Content of silica (1)]×6.5, tan ? peak temperature Tg is at most ?50° C., and rubber hardness at 0° C. is at most 64.