To make control of synthesized voice on the basis of the pitch information (pitch pattern) of the voice nearest the voice to be synthesized from the information about mora number, accent form, latter arrangement, etc.

On the basis of the synthesized voice signal, letter arrangement, mora number, accent form fed from a synthesized voice information input means 11, a pitch pattern searching means 12 searches the pitch pattern of the voice nearest the voice to be synthesized out of a pitch pattern accommodation part 13 in which pitch patterns of natural voices are accommodated, and a voice synthesizing means 14 performs synthetization while pitch pattern control for the fed synthetic voice is made on the basis of the sought pitch pattern. A voice output means 15 emits 16 a synthetic voice with changed pitch pattern.