An operation device, comprising: an operation unit including an operation body worked by a manipulation of an operator; a position detecting part that detects a position of an operation where the operation body is located; and a display unit that displays an operation position of the operation body, wherein the operation unit includes an operation member that includes an operation member manipulated by the operator and having the operation body, a support body that freely supports the operation of the operation body, and a movable load applying mechanism that applies a load to the operation body, in which the operation body includes a movable shaft enabling the operation, wherein the movable load applying mechanism includes a movable member that operates in engagement with the movable shaft, a magnetic generating mechanism that sandwiches the movable member and a gap, and faces one side thereof, and a magnetic viscous fluid that exists in at least a part of the gap and whose viscosity changes according to a strength of a magnetic field, and an operation controlling part that controls the magnetic generating mechanism, wherein the magnetic generating mechanism includes a coil that generates a magnetic field by energization by the operation controlling part, and a first yoke that is provided so as to surround the coil and is disposed on one side of the movable member, wherein the display unit includes a display part that displays the operation position, and a display controlling part that controls a display on the display part, and a controller that controls the operation controlling part and the display controlling part, wherein the controller is configured to form a load curve having a plurality of peak values and a plurality of bottom values of the load depending on a strength of a current value to the coil by the operation controlling part, characterised in that the controller is further configured to control the display controlling part to display, on the display part, a shift state of the operation position in a case of shifting from a first peak value to a first bottom value and from the first bottom value to a next second peak value among the plurality of peak values and the plurality of bottom values. an operation unit including an operation body worked by a manipulation of an operator; a position detecting part that detects a position of an operation where the operation body is located; and a display unit that displays an operation position of the operation body, wherein the operation unit includes an operation member that includes an operation member manipulated by the operator and having the operation body, a support body that freely supports the operation of the operation body, and a movable load applying mechanism that applies a load to the operation body, in which the operation body includes a movable shaft enabling the operation, wherein the movable load applying mechanism includes a movable member that operates in engagement with the movable shaft, a magnetic generating mechanism that sandwiches the movable member and a gap, and faces one side thereof, and a magnetic viscous fluid that exists in at least a part of the gap and whose viscosity changes according to a strength of a magnetic field, and an operation controlling part that controls the magnetic generating mechanism, wherein the magnetic generating mechanism includes a coil that generates a magnetic field by energization by the operation controlling part, and a first yoke that is provided so as to surround the coil and is disposed on one side of the movable member, wherein the display unit includes a display part that displays the operation position, and a display controlling part that controls a display on the display part, and a controller that controls the operation controlling part and the display controlling part, wherein the controller is configured to form a load curve having a plurality of peak values and a plurality of bottom values of the load depending on a strength of a current value to the coil by the operation controlling part, characterised in that the controller is further configured to control the display controlling part to display, on the display part, a shift state of the operation position in a case of shifting from a first peak value to a first bottom value and from the first bottom value to a next second peak value among the plurality of peak values and the plurality of bottom values.