Shikoku Electric Power Co., Inc. which is one of the famous Japanese electric power companies has developed the technology to manufacture the highly functional fly ash (HFA) which is a brand name “Finash” produced by sorting and classifying coal ash generated in coal fired power plants. When HFA is used as substitute for fine aggregate of 100kg/m3, the shotcrete has the advantages of decreasing the amount of dust and rebound during spraying operation, improving the hardened properties of concrete, etc. This paper discusses about the various characteristics such as construction placement, hardened properties and durability of shotcrete with highly functional fly ash (HFA), by means of the results obtained from the spray tests at the model tunnel and actual road tunnel.