The term style of life (German: Lebensstil) was used by psychiatrist Alfred Adler as one of several constructs describing the dynamics of the personality.

Adler was influenced by the writings of Hans Vaihinger, and his concept of fictionalism, mental constructs, or working models of how to interpret the world. From them he evolved his notion of the teleological goal of an individual's personality, a fictive ideal, which he later elaborated with the means for attaining it into the whole style of life.

The style of life reflects the individual's unique, unconscious, and repetitive way of responding to (or avoiding) the main tasks of living: friendship, love, and work. This style, rooted in a childhood prototype, remains consistent throughout life, unless it is changed through depth psychotherapy.

The style of life is reflected in the unity of an individual's way of thinking, feeling, and acting. The life style was increasingly seen by Adler as a product of the individual's own creative power, as well as being rooted in early childhood situations. Clues to the nature of the life style are provided by dreams, memories (real or constructed), and childhood/adolescent activities.

Often bending an individual away from the needs of others or of common sense, in favor of a private logic, movements are made to relieve inferiority feelings or to compensate for those feelings with an unconscious fictional final goal.

At its broadest, the life style includes self-concept, the self-ideal (or ego ideal), an ethical stance and a view of the wider world.

Classical Adlerian psychotherapy attempts to dissolve the archaic style of life and stimulate a more creative approach to living, using the standpoint of social usefulness as a benchmark for change.

Adler felt he could distinguish four primary types of style. Three of them he said to be "mistaken styles".