This study carried out under the title of The fourth bhava is a study is very useful to know about house, vehicle, mother, property, education in ones life; with this, it was done to know in detail and to be helpful in doing many more studies. The hypothesis of the study is to create and confirm the rules for the study of fourth sin and to confirm that the influence of the planets Moon, Mercury and Venus, which are considered as the planets for the study, is present in the horoscopes. Based on these, this study is undertaken.