Psoriatic arthropaty - chronic, autoimmunive, progressing and 30% of all cases deformating joints severe psoriasis illness, that causes disability. The aim of the research: To analyse the patients with psoriatic arthritis who were hospitalised in Vilnius University Santariskiu Clinics Centre of Dermatoveneorology during the year of 2013. Methodology: Retrospective analysis was performed for patients with psoriasis and psoriatic arthritis who were hospitalised in VUH SC Centre of Dermatovenerology during the year of 2013. We have evaluated patients diagnosed with psoriasis and psoriatic arthritis, their sex, age, lenght of the illness, age of diagnosing psoriasis, severity according PASI, joint infingements, complaints, treatment, disability and level of work abilities. Data analysis was made using ‚‘Excel‘‘ statistical software. Results: Totally 651 patients were treated in Centre of Dermatovenereology during the year of 2013. 291 (45%) patients were hospitalised with diagnosis of psoriasis, 121 (42%) of them were also diagnosed with psoriatic arthritis. At the age group to 25 years old 29 (10%) patients were diagnosed with psoriatic arthritis. There were 182 (63%) patients at the age group between 25 and 60 years old with psoriatic arthritis. Over 60 years old there were 79 (27%) patients suffering from psoriatic arthritis. Average lenght of psoriasis in hospitalised patients was 20 years, average age of patients when first time diagnosed with psoriasis was 29 years. The average meaning of PASI was 22. Patients diagnosed with psoriatic arthritis most oftenly complained of these joint pains: ankles and knees - 61 patient (52%), palm joints - 56 (50%), feet - 39 (33%), wrists - 28 (24%), elbows and spine - 27 (23%), shoulders - 21 (18%), hips - 18 (15%), palm fingers - 12 (10%). Systemic treatment was applied totally for 82 (28%) hospitalised patients: 54 (19%) were prescribed methotrexate, 26 (9%) patients - systemic corticosteroids, 2 (1%) patients - biological therapy with etanercept. 186 (77%) patients with severe psoriasis are hospitalised in average 1,1 time per year, remision remains 0,5 to 1 year. At least 25% hospitalised with psoriasis or psoriatic arthritis have disability, their work posibilities are reduced to 50%. Conclusions: According to research during the year of 2013 there were hospitalised 121 patients with diagnosis of psoriatic arthritis. Even 30% of them had joint infringements and severe course of the illness that caused disability. Most of them psoriatic arthritis occured at the young and working age. Evaluating severity of the psoriasis we discovered that 69% patients hospitalised in 2013 had PASI higher than 15. In Lithuania there is possible to get appropriate treatment for psoriasis and psoriatic arthritis. It is aproved that applying correct treatment patients can reduce symptoms and maintain their physical abbilities.