Herbert Alexander Rosenfeld (2 July 1910 – 29 November 1986) was a German-British psychoanalyst. Rosenfeld made seminal contributions to Kleinian thinking on psychotic and other very ill patients; while his emphasis on the role of the analyst in contributing to potential impasses in the analytic encounter has had a wide impact on analysts both in Britain and internationally. Among his most significant contributions were his groundbreaking exploration of projective identification; the development of the concept of "confusion"; and the foundation of a theory of destructive narcissism, since taken up and developed by André Green and Otto Kernberg.