Abstract
An analytical overview of researches carried out abroad, where the relationship between individual’s assertiveness and their psychological health, depression and dangerous addictions were studied, is given in the article. It is stated that assertiveness supports psychological health, psychological maturity, adequate self-esteem; it helps to get rid of low self-reliance; decreases anxiety level and fears; boosts self-esteem and self-respect; protects from emotional problems; helps to overcome stress, to give up smoking and generally to be more successful and less prone to depression. For medical workers, it helps to improve treatment of their patients