A bidet device for toilet bowls comprising: a main body mounted on a rear side of a toilet bowl and having a control part at one side; a main wash bidet part provided below a center protrusion of the main body for spraying water to cleanse posterior areas of a user; at least one wash bidet part attached to the main body for cleansing one of an intestine and a vagina; a purifier part for purifying the water ejected through the main wash bidet part and the wash bidet part; a water ejection regulator part provided on the control part for selectively supplying the water to one of the main wash bidet part and the wash bidet part; characterized in that the wash bidet part is an in-body wash bidet part, that a position adjustor (50 or 60) is provided for adjusting the position of the in-body wash bidet part, that the in-body wash bidet part is a vibration type in-body wash bidet part and includes a bidet body spaced apart from the main body by a predetermined interval and supplied with the water through the position adjustor, a vibrator enclosure threadedly engaged with a bottom end of the bidet body and having a vibrator (37") enclosed within the vibrator enclosure, a spring (38") provided below the vibrator (37") for absorbing the vibration of the vibrator (37"), a vibratory penetrator protruding from the bidet body for insertion into the intestine or the vagina and spraying the water undulated by the vibratory motion of the vibrator (37"), a water ejection mouth cap insertedly fitted around the vibratory penetrator and coupled to the bidet body for supporting the vibratory penetrator, and a connector member provided on a top end of the vibrator (37") for transmitting the vibration to the vibratory penetrator. a main body mounted on a rear side of a toilet bowl and having a control part at one side; a main wash bidet part provided below a center protrusion of the main body for spraying water to cleanse posterior areas of a user; at least one wash bidet part attached to the main body for cleansing one of an intestine and a vagina; a purifier part for purifying the water ejected through the main wash bidet part and the wash bidet part; a water ejection regulator part provided on the control part for selectively supplying the water to one of the main wash bidet part and the wash bidet part; characterized in that the wash bidet part is an in-body wash bidet part, that a position adjustor (50 or 60) is provided for adjusting the position of the in-body wash bidet part, that the in-body wash bidet part is a vibration type in-body wash bidet part and includes a bidet body spaced apart from the main body by a predetermined interval and supplied with the water through the position adjustor, a vibrator enclosure threadedly engaged with a bottom end of the bidet body and having a vibrator (37") enclosed within the vibrator enclosure, a spring (38") provided below the vibrator (37") for absorbing the vibration of the vibrator (37"), a vibratory penetrator protruding from the bidet body for insertion into the intestine or the vagina and spraying the water undulated by the vibratory motion of the vibrator (37"), a water ejection mouth cap insertedly fitted around the vibratory penetrator and coupled to the bidet body for supporting the vibratory penetrator, and a connector member provided on a top end of the vibrator (37") for transmitting the vibration to the vibratory penetrator.