Self Compacting Concrete (SCC) is an innovative concrete with a high fluidity level, so it is able to flow into a cast by exploiting its weight, without requiring compacting process by mechanical vibration or others. The same as normal concrete, self compacting concerete (SCC) has some infirmities such as ; it has small tensile, the ruination pattern is brittle, so it can fall out easily whene there is a shock. By addition of polypropylene fiber is hoped that it can change concrete ruination pattern more flexible. The purpose of this research is to analyze the tensile strength of Self Compacting Concerete (SCC) by addition of kaolin 5% dan polypropylene fiber 1%, 1,5% and 2% and also the effect of the age of the concrete submerge 7, 14 and 28 days to the characteristic of Self Compacting Concrete (SCC). Mix design of this research refers to the research of Anggarwal (2008), that is the mixer of self compacting concrete (SCC4). The testing substance uses silinder 15 cm x 30 xm in size with total numbers 27 with addition of admixture superplasticizer Viscocrete 1003 with the same degree, that is 1% of the weight of the kaolin and cement. The additional of kaolin and polypropylene fiber to the fresh concrete testing has fulfilled the standard determined by EFNARC (2002), except to the testing of J-Ring. From this research is known that the value of the average of the tensile strength in the age of 7 days, 14 days, and 28 days continuously for the 1% of polypropylene fiber is 1,531 MPa, 1, 869 MPa, 1,646 MPa, and for the 1,5% of the polypropylene fiber is 1,713 MPa, 1,610 MPa, 2,092 MPa, and the last for the 2% of polypropylene is 1,847 MPa, 1,888 MPa, and 2,200 MPa. From the research has been done is gained the addition of the most optimum fiber variation degree is 2% with the value of the tensile strength is 2,200 MPa.