Abstract: A two-piece tarp fastener device for fastening tarps together includes a male coupler and a female coupler. The male coupler comprises includes a rod that has a first end and a second end. A knob is coupled to the first end of the rod. A pin is positioned in the rod proximate to the second end. The pin has opposing ends that extend from an outer surface of the rod. The female coupler comprises includes a tube that has a first terminus and a second terminus. The tube is hollow and complimentary to the rod. A button is coupled to the first terminus of the tube. A pair of slots, complimentary to the pin, is opposingly positioned in a wall of the tube. The slots extend from the second terminus to proximate to the first terminus. Each slot has a channel that extends transversely from a respective bottom of the slot.