To provide an inexpensive bolt installing structure in a knuckle bracket capable of installing a bolt without changing a shape of the knuckle bracket or capable of easily installing the bolt in a swelling part being a saddle part from the outside even when the outward swelling saddle part is arranged on the knuckle bracket.

This knuckle bracket 11 being composed of a bowl-shaped holding part 121, a pair of parallel plate-like sandwiching pieces 13 arranged in an end part of the holding part 12 and an installing hole 14 arranged in the sandwiching pieces 13 and inserting and sandwiching a knuckle arm between the sandwiching pieces 13 by inserting a shock absorber 15 into the holding part 12, is featured by welding a head part 17 of a brake hose bracket installing bolt 16 to an optional position of an outside surface of the holding part 12.