Chylothorax is the accumulation of chyle in the pleural cavity due to obstruction or injury arising in the thoracic duct or its large branches.In more than 50% of patients diagnosed with chylothorax, the etiology consists of malignant diseases; and among these, lymphomas are the most common cause, accounting for 60% of cases.We report a case of a 37-year male with T-cell lymphoma who presented with bilateral pleural effusion; pleural fluid analysis confirmed chylothorax.A solid lymph node was detected in the left zone 4 on neck ultrasonography.Tru-cut biopsy was done and reported as T-cell lymphoma.The cytology was consistent with Class V (Malignant) T-cell lymphoma infiltration.Bilateral chylothorax, a complication of T-cell lymphoma, is a rare presentation of this disease.Our patient was diagnosed rapidly with both chylothorax and lymphoma.We started the treatment immediately and saved his life.