PROBLEM TO BE SOLVED: To provide a recombinant measles virus for use in the vaccine of the infection by Paramyxoviridae virus and in screening methods for the therapeutic drug of the infection by Paramyxoviridae virus.SOLUTION: A recombinant measles virus has, at the outside of a viral particle, a variant F protein having an amino acid sequence derived from the F protein of Paramyxoviridae virus, and a variant H protein having an amino acid sequence derived from the HN protein, H protein, or G-protein of Paramyxoviridae virus.SELECTED DRAWING: None