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Chemical additives are usually used in papermaking industry as an effective way to enhance the strength of paper. However, the researches indicate that their effectiveness depends on dosage rate and application of them is associated with some problems. Recently utilization of cationised fiber has been suggested as a solution. Therefore in this study, the effects of cationised fiber have been evaluated as strength additive. Long fibers of softwoods by the use of cationic agent EPTMAC at 5, 10 and 15% were cationised and added to the CMP on levels 1, 3 and 5%. Finally, tensile, burst and tear strength of hand sheets were evaluated. The results showed that with increasing cationised long fiber levels, the strength of CMP will enhance too. Long fibers cationised at 10% also brought about highest strength.