Anxiety disorders are one of the most common psychiatric disorders. They ocuure at any age. They occur more frequently in females than in males.They are chronic. Most of them are comorbid with the other anxiety disorders and depression. They include: panic disorder, generalized anxiety disorder, phobias (specific phobia, agoraphobia and social phobia), obsessive-compulsive disorder and post-traumatic stress disorder. They are characterized by anxiety. This anxiety is not the result of external dangers, they comes from inside. Anxiety is related to the future events. Anxiety takes a long time. It reduces the quality of life. There are many theories about its development. In psychoanalytic theory, anxiety is result of intrapsychic conflict. In cognitive theory, anxiety disorders are associated with errors in the perception of danger. Behavioral theories are based on theories of learning. In biological therories, anxiety disorders are associated with changes in neurotransmitters, hypersensitive amigdala and genetic predisposition. Diathesis-stress paradigm connects risk factors for anxiety disorders with the effects of stress. Anxiety disorders are successfully treated. Many methods are used. Best results shows a combination of pharmacotherapy and psychotherapy. From pharmacotherapy are most used anxiolytics and antidepressants. Less frequently are used beta-blockers, anticonvulsants and antipsychotics. The first choice of psychotherapy is cognitive-behavioral therapy. Others psychotherapies that are used are: psychodynamic psychotherapy, group psychotherapy, family and interpersonal psychotherapy. More features include: sociotherapy, relaxation techniques, hypnosis and brain stimulation methods.