_________________________________________________Background: Psoriasis, autoimmune chronic inflammatory skin disease, affects 2-3% of population. It causes poor lifequality due to its disfiguring lesions and co-morbidities. Interleukin (IL)-23/T-helper (Th)-17 &IL-23/Th-22 axes activation, signal transducer and activator of transcription (STAT)-3 pathway stimulation and proinflammatory cytokines (IL-6, IL-17, IL-22 &TNF-α) overproduction are psoriasis main mechanisms. Psoriasis conventional treatment has many adverse effects as immunosuppression and hepatotoxicity with consequent lack of patients' compliance. Aim of work: Evaluating the probable curative effect of blocking STAT-3 pathway using ochromycinone [an STA-21 (STAT-3 inhibitor)] on Imiquimod (IMQ)-induced psoriasis model in adult male albino rats. Materials &Methods: 1 cm 2 back skin was shaved in twenty-four adult male albino rats. They grouped into; control group [group-I], IMQ group [group-II, received 20mg/cm 2 IMQ-5% topically on the shaved skin for