There is provided an operation device provided with: an operation member displaceable by an operator; a two-dimensional support mechanism in which a pair of one-dimensional support mechanisms that individually displaceably supports the operation member 11 in mutually crossing two directions are connected in series; and a pair of potentiometers that individually biases the operation member 11 toward a neutral position of displacement by the respective one-dimensional support mechanisms, in which biasing forces that the pair of potentiometers applies to the operation member against displacement of the operation member are different from each other, and in which a command signal according to the displacement of the operation member of the respective one-dimensional support mechanisms is output.