In an image creating device (201) for creating an image viewably showing the distribution of an environment parameter of the environment around a character in a virtual space, a parameter acquiring unit (202) acquires an environment parameter of the environment around a character in each direction from the character, a reference curve setting unit (203) sets a reference curve surrounding the character, a trajectory point setting unit (204) sets a trajectory point in a position moved in a predetermined direction from each reference point in the reference curve by an amount of move associated with the value of the environment parameter at the reference point acquired in the direction from the character toward the reference point, and an image creating unit (205) creates an image showing the trajectory curve passing through the set trajectory points and the character viewed from the point of view placed in the virtual space.