Republication of the book. “Changing the sexuality” Yes? Or no? Change in appearance is one of discussed matters in Fiqh and follows the question that, will the gender change after changing the appearance? If so what happens to social communications, heritance, marriage, etc… . Will that person be named as a Transgender? These and many more questions are discussed in the book from religious point of view and legally. According to the sex changing operation in our country and the increase in their number, their legal and religious after effects are of high importance and questions have similarities. This book discusses the matter both with reason and scientifically with accordance to religious documents, a valuable effort. This book is the result of out of Fiqh lessons of Grand Ayatollah Sheikh Yadu’llah dozdozany Tabrizi and is done with the cooperation of scientists and psychologists and sexologists. The book is written in simple language and is understandable by everyone.