An outer casing for a control cable 10 has an inner tube 12, which includes a resin tube having a tubular resin layer and two metal wires buried, in the resin layer of the resin tube, in parallel with an axial direction and at positions symmetrical with each other about an axis of the resin tube, in which when an outer diameter of the resin tube is D (mm) and a distance between the two metal wires is A (mm), the following formulae (1) and (2) are satisfied. 1.5≦D≦4  (1) 0.5 D≦A≦0.7 D  (2)