To obtain modified asphalt that prevents rut drilling even in summer and excellently maintains drainage property and noise reduction and makes pavement.

The modified asphalt comprises a thermoplastic elastomer (A) that has a backbone composed of a styrene-based elastomer and a side chain containing at least one selected from the group consisting of an imino group, a nitrogen-containing heterocycle and a covalent-bonding crosslinking site and a carbonyl-containing group and asphalt (B).