In this modern era, textile products that use natural fibers are more in demand because they offer various benefits such as renewable properties, excellent biodegradability and ease of manufacture that do not have a negative effect on the environment. Pineapple fiber is one of the natural fibers besides cotton which is used as raw material for air filter is flax fiber. This fiber is obtained from the leaves of pineapple plants by extraction, carried out to separate the cambium and fiber using a decorticator machine. Pineapple (Ananas comous L.) is one of the leading fruit commodities in Indonesia which leaves are leftover products. From research conducted by M. Asim, et al., (2015) it is known that the chemical composition and physical properties of pineapple fiber are close to the composition of flax fibers. So it is possible that pineapple fiber can be made into nonwoven which functions as an air filter such as flax fiber. The experiment of making air filter nonwoven from pineapple fiber used thermal bonding method with the help of low melt polyester fiber as a bonding agent. The comparison of pineapple fiber and low melt polyester fiber used is 9: 1, then made with three variations of gramation 400, 500 and 600g / m2. The thermal bonding process is carried out at a temperature of 1300C and pressed at a pressure of 25 bar for five minutes. Tests carried out include gramation, thickness, density, tensile strength, elongation, water permeability, porosity, pore size and filtering efficiency. The testing results of nonwoven for air filters with three variations of gramation fabric have an effect on the dimensions and physical properties of the nonwoven produced. The greater the Gramation of fabric, the higher the thickness, density, strength, stretch and filtering efficiency and the greater the gramation of the fabric, the smaller the value of water permeability, porosity and pore size.