The present article discusses the issue of whether soul and body in the Leibniz philosophy are homogeneous or not, whether they influence each other, and how their conformity is explained, in other words, the article studies and analyzes Leibniz's ideas about the connection between soul and body. To this end, a few articles written by Leibniz, particularly monadology and discourses on metaphyics and some of his letters such as those written to Clark an Arneau and also the works of his expositors such as the expositions by Latta, Russel and Ishigora have been studied carefully, and the materials concerning soul and body have been extracted and analyzed resulting in the following: 1. Iebniz believes that soul and body are homogeneous, and soul is the ruling monad while body is a collection of subordinate monads, however, one cannot agree with this leibniz’s idea, because no proof exists to establish the monad, and if soul is to be a ruling monad, it is necessary that in some cases body hs considered as the soul. 2. There is no mutual influence between soul and body in leibniz philosophy, and their conformity is merely explained by the principle of pre-established harmony, however, this idea requires saying by coercion and loss of the best reason for establishing the soul.3. Combination of soul and body is inclusive at the level of monads and unanimous at the level of phenomena and establishment of this idea is based on the establishment of the monad theory and the definition offered by leibniz about soul and body.4. Soul is present throughout body, however, its presence does not mean diffusion.