A pixel circuit, display device, and driving method thereof are provided. The pixel circuit which is disposed in a place where a signal line through which a signal current is caused to flow, and scanning lines through which control signals are supplied, respectively, cross each other and which includes an electroluminescence element, a drive transistor for supplying a drive current to the electroluminescence element, and a control portion adapted to operate in accordance with the control signals for controlling the drive current of the drive transistor based on the signal current, the control portion including first sampling unit for sampling the signal current being caused to flow through the signal line, second sampling unit for sampling a predetermined reference current being caused to flow through the signal line just before or after the signal current, and difference unit for generating a control voltage corresponding to a difference between the sampled signal current and the sampled reference current. The drive transistor receives the control voltage at its gate and supplies a drive current being caused to flow through its source and drain to the electroluminescence element to make the electroluminescence element emit light.