The present invention provides an asphalt composition comprising an asphalt and antistripping additive comprising at least one of the compound having the formula (I), (II) or (III):[R1O-(PO)m(EO)n]x-P(=O)-(OH)y(I)wherein R1 represents a linear hydrocarbon radical having 8 to 24 carbon atoms or an alkyl phenyl group having 8 to 24 carbon atoms, PO represents oxypropylene group, EO represents oxyethylene group, each of m and n represents the number of added molecules, m is a number of 1 to 6, n is a number of 0 to 6;[R2O-(PO)m(EO)n]x-P(=O)-(OH)y(II)wherein R2 represents an aliphatic hydrocarbon radical having a branched methyl group and having 8 to 24 carbon atoms, PO represents oxypropylene group, EO represents oxyethylene group, each of m and n represents the number of added molecules, m is a number of 0 to 6, n is a number of 0 to 6; and[R3O-(PO)m(EO)n]x-P(=O)-(OH)y(III)wherein R3 represents an aliphatic hydrocarbon radical having two or more branched methyl groups or at least one of branched group including 2 or more carbons and having 8 to 24 carbon atoms, PO represents oxypropylene group, EO represents oxyethylene group, each of m and n represents the number of added molecules, m is a number of 0 to 6, n is a number of 0 to 6, each of x and y of the formula (I), (II) or (III) being a number of 1 to 2, the sum total of x and y being 3, R1,R2 and R3 being saturated or unsaturated.