To provide a reinforcing bar-holding tool in a concrete product capable of a reinforcing bar-made reinforcing member at a prescribed position in a form for molding a concrete product.

This reinforcing bar-holding tool is provided with a body 12 formed in a crossed shape. A projection part extending downward of the body 12 is contacted on the bottom molding face of a form, and made a support leg part 13 supporting the weight of a reinforcing bar reinforcing member 61. A projection part extending sideward of the body 12 is contacted on the molding face of the side part of the form, and made regulation projection parts 14, 15 preventing movement to a direction along the lateral reinforcing bar 63 of the support leg part 13. A vertical reinforcing bar holding part 21 for holding the end of a vertical reinforcing bar 62 is provided on the half-way of the projection part extending upward of the body 12. A lateral reinforcing bar-holding part 31 for holding the end part of the lateral reinforcing bar 63 is provided on the base end side of the regulation projection parts 14, 15 of the body 12. Thus, both the reinforcing bar holding parts 21, 31 are regulated and arranged at a position separated by a prescribed distance from the molding face of the form by the regulation projection parts 14, 15. Thus, the reinforcing bar- reinforcing bar 61 can be held at a prescribed position in the form.