In a holding component 1, for a vehicle, having: a fixing portion 10 which houses and fixedly engages with a mounting tool 101 having been moved upward through a lower opening 11H; and a holding portion 20 for holding a predetermined member 5 by an upper holding portion 21 and a lower holding portion 22 being engaged with each other, in a state where an engagement portion 23 provided in the upper holding portion 21 is housed in and engaged with an engagement housing portion 24 provided in the lower holding portion 22, a pressing portion 200 provided in the engagement portion 23 presses downward the mounting tool 101 which is engaged with and fixed to the fixing portion 10.