The Anandamaya kosha or "sheath made of bliss" (ananda) is in Vedantic philosophy the most subtle or spiritual of the five levels of embodied self.
The Anandamaya-kosa (sheath of bliss or Karanopadhi - causal body) is here associated with the Spiritual Soul or Buddhi principle (the sixth of the seven principles) In the teachings of Satguru Sivaya Subramuniyaswami (Himalayan Academy), the Anandamaya kosha is not a sheath in the same sense as the four outer koshas, but rather constitutes the soul itself, a body of light.
This Anandamaya kosha evolves through all incarnations until finally merging in the Primal Soul, Parameshvara.
Unlike other Vedantic philosophers, Sri Aurobindo does not consider the five selves as koshas, "sheaths", but instead sees them as the evolutionary principles of the Inner or True Divine Self at each plane of existence.
The Anandamaya Self is thus the individualised Divine Self that will emerge with the actualisation of the Plane of Ananda, following and even surpassing the Supramental stage of evolution.