Imaginary Relativity is a idea which completes Einstein's Theory of Relativity Theory. According to the recommended idea, the speed of light is not constant and absolute in an inertial frame. On the other hand, the speed of a light pulse in an inertial frame, moving with velocity u, equals to an imaginary value instead of the constant value c as it is considered in Einstein's Theory of Relativity Theory. This idea first was published “Journal WSEAS TRANSACTIONS on COMMUNICATIONS, Volume 9 Issue 2, February 2010” by Mehran Rezaei.