Cytological diagnosis of malignancy in body fluids needs adequate cellularity and good cyto morphology. Diagnosis will be made easy if architectural pattern is also appreciated. Various techniques have been tried for extracting sufficient cells from body fluids and for establishing good morphology to improve the diagnostic accuracy. We tried a new cell block technique for cytological study of bladder wash fluid sample and diagnosed bladder Transitional cell carcinoma with good architectural pattern and cytomorphology. This cell block preparation is a simple, rapid, less expensive, reliable and valuable tool for diagnosing malignancy and can be used as a supplementary procedure to improve the diagnostic accuracy.