A manual operation device of the present disclosure allows a user to intuitively recognize a force pattern by providing a graphical representation of the force pattern on a display unit. The force pattern or a relationship between an operation position an operation unit of the manual operation device and a control value is visually represented as, for example, a two-dimensional line graph. In this manner, the reaction force is suitably adjusted to an operation force of the user to reduce an false operation of the manual operation device, because the user can easily controls the reaction force for achieving an improved operability.