A work vehicle having a tow apparatus, comprising: a tow pin having a main body portion in a columnar shape and a first protrusion protruding outward from an outer circumferential surface of the main body portion; an upper bracket structure (2, 4) having a first through hole in which the main body portion is inserted, and restricting passage of the first protrusion; and a lower bracket located under the upper bracket structure (2, 4) at a distance from the upper bracket structure (2, 4) and having a second through hole in which the tow pin can be inserted, the main body portion of the tow pin being inserted in at least the first through hole and the first protrusion being located under the upper bracket structure (2, 4), wherein the first through hole has a first main body insertion portion having a two-dimensional shape greater than an outer circumferential shape of the columnar shape of the main body portion, and the second through hole has a second main body insertion portion having a two-dimensional shape greater than the outer circumferential shape of the columnar shape of the main body portion, and a second recess portion connected to an outer circumference of the second main body insertion portion and having a two-dimensional shape greater than the outer circumferential shape of the first protrusion, characterized in that the first through hole further comprises a first recess portion connected to an outer circumference of the first main body insertion portion and having a two-dimensional shape smaller than an outer circumferential shape of the first protrusion, and that the first main body insertion portion is annular. a tow pin having a main body portion in a columnar shape and a first protrusion protruding outward from an outer circumferential surface of the main body portion; an upper bracket structure (2, 4) having a first through hole in which the main body portion is inserted, and restricting passage of the first protrusion; and a lower bracket located under the upper bracket structure (2, 4) at a distance from the upper bracket structure (2, 4) and having a second through hole in which the tow pin can be inserted, the main body portion of the tow pin being inserted in at least the first through hole and the first protrusion being located under the upper bracket structure (2, 4), wherein the first through hole has a first main body insertion portion having a two-dimensional shape greater than an outer circumferential shape of the columnar shape of the main body portion, and the second through hole has a second main body insertion portion having a two-dimensional shape greater than the outer circumferential shape of the columnar shape of the main body portion, and a second recess portion connected to an outer circumference of the second main body insertion portion and having a two-dimensional shape greater than the outer circumferential shape of the first protrusion, characterized in that the first through hole further comprises a first recess portion connected to an outer circumference of the first main body insertion portion and having a two-dimensional shape smaller than an outer circumferential shape of the first protrusion, and that the first main body insertion portion is annular.