A recording tape cartridge which, with a structure having good produceability, can prevent wear of regions of abutment of a braking member and a releasing member at a time when a reel rotates. In the recording tape cartridge, when the braking member is positioned at a rotation locking position at which the braking member is engaged with an engaging gear provided at a floor portion of a reel hub, rotation of the reel, which is accommodated within a case, with respect to the case is impeded. When the braking member is held at a rotation permitting position at which engagement is released while the braking member abuts a clutch member, rotation of the reel with respect to the case is permitted. The braking member and the clutch member are respectively formed by resin molding, and abut one another at a slide-contact projection which is a resin portion, and a metal plate which is fixed to a clutch main body by caulking.