The methods to produce the high performance papers are roughly divided into the next three procedures, (1) the utilization of functional fibers as paper raw materials, (2) the control of fiber aggregation structure to give higher performance, and (3) the composition with another functional materials. In this paper, some examples of the high performance papers produced by these procedures are introduced.As the products by the procedure (1), a transparent electroconductive sheet manufactured by using electroconductive fibers and synthetic pulp, a water-soluble paper consisted of fibrous carboxymethylcellulose and wood pulp, and a water-absorption paper which is a poly-ion-complex sheet of fibrous carboxymethylcellulose with a cationic polymer are taken up and explained.The typical products by the procedure (2) are air and liquid filter papers. Here wood or non-wood pulp and synthetic fibers different in their fiber diameters which are available for the papers, are discussed. In addition, an air-permeable oilproof paper using to bags for fried foods is explained.As the examples of the procedure (3), the products obtained by utilizing coating technologies are explained, such as a UV light-, oxygen-, or temperature-detectable sheet and a liquid-sensitive sheet.