This question quietly contains a more interesting one. Asking whether belief in reincarnation is needed for past life regression to work assumes there is an effect to explain, and the way belief shapes that effect tells you a great deal about what is really happening in these sessions.
Research on regression points to a striking pattern. People who already believe in reincarnation are far more likely to produce vivid past-life material, and the content of what they report tracks their expectations and the hypnotist’s suggestions rather than any verifiable history. When a specific past identity is suggested, suggestible participants readily generate it in detail. That places belief not at the edge of the process but near its center. The conviction that past lives exist helps create the very experience the session then offers as evidence for them.
So belief is not exactly required, but it is a strong driver of the dramatic, immersive result most people are picturing. A skeptic can still undergo regression and may still relax deeply, since the underlying technique is guided hypnosis. What the skeptic is far less likely to produce is a rich, emotionally convincing past-life narrative, because the willingness to treat the imagery as a real memory is part of what builds it.
This reframes the idea of effectiveness. If effective means recovering genuine memories of earlier lives, then nothing about belief makes that possible, because there is no scientific evidence for past lives in the first place. If effective means a relaxing, sometimes meaningful imaginative experience, then yes, belief makes that experience richer and more affecting. The two meanings should not be blurred together, since one is a real subjective event and the other is a claim about history that does not hold up.
A caution follows from the same research. Because suggestion and prior belief shape the content, these sessions can generate confident memories of things that never happened, and such memories feel indistinguishable from real ones. For anyone exploring distressing material, that hazard matters, and working with a qualified therapist is the safer path. Belief, then, is less a requirement than a clue, showing that the experience is built from the mind rather than retrieved from a past.…