An arrow retainer for a crossbow including a projection extending from a hood of the crossbow to retain an arrow on a stock of the crossbow. A plurality of projections may be affixed to a retainer insert that is detachably disposed within a receptacle in the hood of the crossbow. Alternatively, the retainer insert may be detachably disposed within a recess of a housing that is detachably connected to the hood of the crossbow. A spring may bias the projection toward the stock. The projection may be formed of bristles or of a circumferential surface of a wheel member.