Thinking states are very important factors in the evaluation of and interaction with virtual spaces. Physiological information is often used to estimate thinking states objectively. However, it is difficult to estimate complex feelings numerically from limited physiological information. In this paper, we propose a method for the evaluation of thinking states in cyberspace using multiple physiological parameters. We developed a mapping matrix that converted physiological data into a composite of thinking states. In experiments, we found that with one mapping matrix the thinking states of different subjects for the same task could be derived. In addition, we investigated the similarities and differences between six estimated thinking states by using the mapping matrix.