Psoriatic arthritis (PsA) manifests itself as an inflammatory rheumatic disease of a chronic nature, and it mostly occurs in people suffering from psoriasis. The symptoms in the joints in the form of arthritis most often occur after the diagnosis of psoriasis as a primary skin disease has been established. The seropositivity of patients with psoriatic arthritis is the same as in the general population, so the disease is included in the group of seronegative arthritis. The pathogenesis of PsA has not been fully elucidated, the latest findings support the fact that a set of different factors, such as genetic predisposition and numerous external elements, cause immune reactions that lead to the appearance of the disease itself. Among the symptoms that patients complain about are pain and stiffness in joints affected by inflammatory changes. The clinical picture of psoriatic arthritis can manifest itself differently; in some the joints themselves are more affected and in others the surrounding joint structures. Since the origin and development of the disease is extremely complex, establishing a diagnosis in the early stages is very difficult. In order to establish a diagnosis, patients undergo diagnostic tests, such as radiological diagnostics and laboratory blood tests. The treatment of patients suffering from psoriasis and psoriatic arthritis is aimed at reducing the symptoms that manifest on the patient's skin and reducing the symptoms that manifest on the joints and other structures. For the purpose of treatment, numerous drugs are prescribed in order to reduce the inflammatory process and reduce pain. The application of physiotherapy procedures greatly contributes to reducing the symptoms of the disease, slowing down the course of the disease, preventing the deterioration of joint structures, and preserving the existing condition and achieving a higher quality of life. In order for physiotherapy procedures to have the greatest possible effect, it is very important to carry out a physiotherapy assessment of the patient's condition, on the basis of which the goal of the therapy itself is determined. Physiotherapy procedures include: exercises for cardiovascular fitness, strengthening exercises, improving joint mobility, education, and other therapeutic procedures. PsA as a systemic disease negatively affects the level and quality of life of the affected person. Therefore, in order to reduce the consequences of such a disease, a multidisciplinary approach is necessary. In the PsA treatment, physical therapy is of great importance for improving the state of health and quality of life.