A passenger protection apparatus allows a bag body of an airbag unit to inflate and expand in a stable manner when an impact is input. The passenger protection apparatus includes an airbag unit that is arranged below an article storage box and that causes a bag body to inflate and expand in a direction of a front seat when an impact is input. The passenger protection apparatus further includes a guide member that covers a gap between a lower end of the article storage box and an adjacent member adjacent to the lower end when bag body inflates and expands.