To prevent the adhesion of mud and reduce an amount of mud carried out of a cultivated farmland by arranging a plurality of linear grooves which have a predetermined length in a plurality of rows on a surface of a mud adhesion prevention layer in a bottom part of a lug.

A tire 1 is for an agricultural work vehicle (tractor) having a tire size of 11.2 to 24 and is provided with a plurality of lugs 3 which are arranged at intervals in the direction of outer periphery of a tread. A plurality of linear grooves M which have a predetermined length are arranged at a predetermined interval in the longitudinal direction of the groove M in a plurality of rows on an outer surface of a mud adhesion prevention layer in a bottom part 8 of the lug between the lugs 3. Each groove M has a width of 0.4 to 1mm, a length of 10mm, and a depth of 1 to 2mm. An interval in the direction of row between the grooves is 6 to 10mm, an interval in the longitudinal direction between the grooves is 2mm, and a ratio of the length of the groove to the interval between the grooves is 0.2.