Provided is a pedal device for a vehicle, with which deviation of the detection start point and the detection load can be favorably minimized relative to the prior art, despite the lack of a detection start point adjustment mechanism and a detection load adjustment mechanism. A tread force detector 42 is provided with a first pin 42f that protrudes from the tread force detector 42. A positioning hole 22e into which the first pin 42f of the tread force detector 42 is inserted is formed in a sub-lever 22 linked to a pedal arm 20a of a brake pedal 20. The tread force detector 42 is fastened to the sub-lever 22 while the first pin 42f is being pressed against the inside peripheral edge of the positioning hole 22e by the reaction force of a load spring 38. The load spring 38 is arranged in a fixed location between a reaction force lever 40 and the tread force detector 42.