A to-be-cooled body protection structure arranged on a saddle-ridden vehicle, in which a to-be-cooled body (E) requiring cooling with a travelling air is supported to a body frame (F) including a front fork and a head pipe at a front end portion of the body frame (F), the front fork journaling a front wheel (WF), the head pipe steerably supporting a steering handlebar , and a guard member straddles over a pair of left and right frame members configuring a part of the body frame (F), the guard member being supported to the body frame (F) and located at a rear of the front wheel (WF) in the center of the vehicle width direction so as to protect at least a front portion of the to-be-cooled body (E), wherein a first plurality of through-holes are provided on the guard member , a second plurality of through-holes (61 to 66) as part of the first plurality of through-holes (61 to 68) each include at least one linear edge portion (61a, 61b; 62a, 62b, 62c; 63a, 63b, 63c; 64a, 64b, 64c; 65a, 65b, 65c; 66a, 66b) linearly extending, and are formed into non-circular shapes, and the non-circular through-holes (61 to 66) are arranged such that linear ribs are formed between linear edge portions (61a, 62a; 62b, 63b; 63a, 64a; 64b, 65b; 65a, 66a), as said linear edge portion, facing each other of adjacent ones of the non-circular through-holes, characterized in that the non-circular through-holes (61 to 66) are formed into triangles each having three linear edge portions (61a, 61b; 62a, 62b, 62c; 63a, 63b, 63c; 64a, 64b, 64c; 65a, 65b, 65c; 66a, 66b) as said linear edge portion, and linear edge portions , as said linear edge portion, corresponding to long sides of the triangles of adjacent ones of the triangular through-holes (61 to 66) are located so as to face each other, the guard member includes a center rib linearly extending at a center portion in a vehicle width direction, and among three linear edge portions (61a, 61b; 63a, 63b, 63c; 65a, 65b, 65c) provided in each of the through-holes selected among the second plurality of triangular through-holes (61 to 66), remaining linear edge portions excluding linear edge portions (61a; 63a, 63b; 65a, 65b) facing one another of adjacent ones of the selected triangular through-holes are located along the center rib . wherein a first plurality of through-holes are provided on the guard member , a second plurality of through-holes (61 to 66) as part of the first plurality of through-holes (61 to 68) each include at least one linear edge portion (61a, 61b; 62a, 62b, 62c; 63a, 63b, 63c; 64a, 64b, 64c; 65a, 65b, 65c; 66a, 66b) linearly extending, and are formed into non-circular shapes, and the non-circular through-holes (61 to 66) are arranged such that linear ribs are formed between linear edge portions (61a, 62a; 62b, 63b; 63a, 64a; 64b, 65b; 65a, 66a), as said linear edge portion, facing each other of adjacent ones of the non-circular through-holes, characterized in that the non-circular through-holes (61 to 66) are formed into triangles each having three linear edge portions (61a, 61b; 62a, 62b, 62c; 63a, 63b, 63c; 64a, 64b, 64c; 65a, 65b, 65c; 66a, 66b) as said linear edge portion, and linear edge portions , as said linear edge portion, corresponding to long sides of the triangles of adjacent ones of the triangular through-holes (61 to 66) are located so as to face each other, the guard member includes a center rib linearly extending at a center portion in a vehicle width direction, and among three linear edge portions (61a, 61b; 63a, 63b, 63c; 65a, 65b, 65c) provided in each of the through-holes selected among the second plurality of triangular through-holes (61 to 66), remaining linear edge portions excluding linear edge portions (61a; 63a, 63b; 65a, 65b) facing one another of adjacent ones of the selected triangular through-holes are located along the center rib . <EOS>