A terminal crimping device crimps a terminal metal fitting positioned at a crimping position to an electric wire. The device includes an anvil which is positioned under the crimping position, a crimper which is positioned above the crimping position, a pressing mechanism which presses down the crimper to crimp the terminal metal fitting to the electric wire with the anvil and the crimper, a terminal supply mechanism to supply the terminal metal fitting to the crimping position, a position adjusting mechanism which is provided in the terminal supply mechanism to adjust a position of the terminal metal fitting for the crimping position, and a photographing device to photograph the terminal metal fitting fed to the crimping position.