---

Most cancer patients complain from pain in final part of their disease. One of the aims of health center, in the country is how to relieve pain from such patients. Therefore we tried to carry on a semi-experimental research to find out the effectiveness of Morphine by either continuous infusion or intermittence injection in such patients. We used non-random sampling, the total number of samples were 11 female and 9 male. These patients were on their final phase of disease. The process that we collected the information was based on the check-list which consist of two sections, in first part the demographic characterization of patients was recorded, using observation and interview with patients and in second part of these check-list the level of pain was assessed using visual analogue scale, which marked every two hours and finally the average of this scale in 24 hours is evaluated using as index in our study. Our results indicate that continuous infusion is more effective in relieving pain than intermittence injection (P<0.03). The results of this investigation showed that, age, sex and different type of cancer has got no meaningful variation in changing the main findings of this semi-experimental research.