Abstract
In a view of the world according to quantum mechanics, physical reality, locality and causality that have been regarded as a physical basic premise failed as pointed out by J.S. Bell. In this view, physical reality is objective and the existence of the quantum object (elementary particle) cannot have a subjective choice according to the free will of the human being observer. However, it becomes necessary for an observer to make measurements by various methods to confirm whether the quantum object exists. A surprising conclusion was shown by J.H. Conway and S.B. Kochen in 2006 that there was free will to control an observation result of the quantum object if there was free will in the choice of the measurement method for the observer. This is called the free will theorem. In this theorem, free will is expanded from the macro creature called the human being by the micro elementary particle of a non-creature. In this lecture, I consider the meaning of human free will and free will of the elementary particle.
