In recent years, fibre-reinforced polymeric composites have received attention because of their high specific strength and modulus. Although, generally high strength synthetic fibres are used in the composites, there has been a growing interest in the use of natural cellulosic fibres as the reinforcement for polymeric matrix. While these fibres may not be as strong as carbon and aramid, their main advantages are low cost and biodegradability. Further, most cellulosic fibres are harvested yearly and the supply should be inexhaustible compared to the limited supply of the oil reserve from which many synthetic fibres are derived. The interest of the usage of natural pineapple fiber as reinforcement in composites is also increasing due to its hich cellulose content, low price and biodegradabilty. This paper is concerned about the general properties of pineapple fibers.