An ultrasound diagnostic device generating a frame reception signal by compounding sub-frame reception signals through spatial compounding, the ultrasound diagnostic device including a control circuit that includes a sub-frame enhancement map creator creating a plurality of sub-frame enhancement maps, each corresponding to one sub-frame reception signal, the creating of each of the sub-frame enhancement maps being performed by calculating, for a pixel region reception signal in a corresponding sub-frame reception signal, an enhancement amount in accordance with a characteristic value calculated based on the pixel region reception signal, the pixel region reception signal corresponding to a pixel region composed of one or more pixels, and an enhancement-applied reception signal generator generating an enhancement-applied frame reception signal by compounding pixel region reception signals included in the sub-frame reception signals based on pixel region positions, taking into account the enhancement amount in at least one of the sub-frame enhancement maps.