The mental body (the mind) is one of the subtle bodies in esoteric philosophies, in some religious teachings and in New Age thought. It is understood as a sort of body made up of thoughts, just as the emotional body consists of emotions and the physical body is made up of matter. In occult understanding, thoughts are not just subjective qualia, but have an existence apart from the associated physical organ, the brain.

A subtle body is one of a series of psycho-spiritual constituents of living beings, according to various esoteric, occult, and mystical teachings. According to such beliefs each subtle body corresponds to a subtle plane of existence, in a hierarchy or great chain of being that culminates in the physical form.