The vulnerability of Unreinforced Masonry (URM) structures have been proved by many big earthquakes in the past, due to their low seismic capacity. Most URM buildings are built with little or no consideration of seismic loading, and these are not capable of resisting the expected seismic ground motion, which caused damage and collapse of the buildings and have been the major cause of human and economic losses during the past earthquakes.There are many kinds of retrofitting materials and methods have been developed and used to strengthen the URM houses, such as Fiber Reinforced Polymers (FRP), steel mesh cage, surface treatment using Shotcrete, post-tensioning using rubber tires, etc. However, they are relatively expensive and not available in many parts of the world, which is of prime importance in the third world countries. Therefore, we propose to use a natural fiber called Abaca fiber, which is a locally available and inexpensive material with high tensile strength. In this paper, tensile test of Abaca fiber has been investigated. Based on the results obtained from the tests, it can be concluded that Abaca fibers have high potential for retrofitting material of URM houses in developing countries.