Abstract: Provided is a roof rack coupler for coupling an accessory to a roof rack. The coupler includes a roof rack member for fastening to the generic roof rack bracket. The coupler further includes an accessory member, typically releasably fastenable to the accessory, for engaging with the roof rack member. Securing means is provided for securing the accessory member to the roof rack member. The accessory member may be dropped within and lifted out of the roof rack member to facilitate rapid assembly and disassembly.