Bathing apparatus for an infant or child, comprising basin means for bathing the infant or child and supporting means of said basin means at a convenient height for a person bathing the infant or child, whereby said supporting means comprise: - a hydraulic cushion (12.1), including a first hydraulic chamber (12.2) made, at least partially, of flexible material and supporting said basin; characterized in that the bathing apparatus also comprises: - automatic distributor-diverter means of a flow of pressurized running water, including: - hydraulic connection means (13.1) between a pressurized running water distribution network and a second hydraulic chamber (12.3), which comprises: - first hydraulic communication means between said same second hydraulic chamber (12.3) and said first hydraulic chamber (12.2), including first valve means (14.1) that allow the automatic passage of a continuous flow of pressurized running water from said second hydraulic chamber (12.3) into said first hydraulic chamber (12.2), until said first hydraulic chamber (12.2) is filled with pressurized water, so that said first hydraulic chamber (12.2) maintains said hydraulic cushion (12.1) stably configured as support for said basin means at said convenient height for a person bathing the infant or child, and - second hydraulic communication means, branched from said second hydraulic chamber (12.3) toward said basin means and including second valve means (15.1), which allow the automatic passage of a continuous flow of running water toward said basin means, when said first hydraulic chamber (12.2) and said second hydraulic chamber (12.3) are completely filled with pressurized water. - a hydraulic cushion (12.1), including a first hydraulic chamber (12.2) made, at least partially, of flexible material and supporting said basin; - automatic distributor-diverter means of a flow of pressurized running water, including: - hydraulic connection means (13.1) between a pressurized running water distribution network and a second hydraulic chamber (12.3), which comprises: - first hydraulic communication means between said same second hydraulic chamber (12.3) and said first hydraulic chamber (12.2), including first valve means (14.1) that allow the automatic passage of a continuous flow of pressurized running water from said second hydraulic chamber (12.3) into said first hydraulic chamber (12.2), until said first hydraulic chamber (12.2) is filled with pressurized water, so that said first hydraulic chamber (12.2) maintains said hydraulic cushion (12.1) stably configured as support for said basin means at said convenient height for a person bathing the infant or child, and - second hydraulic communication means, branched from said second hydraulic chamber (12.3) toward said basin means and including second valve means (15.1), which allow the automatic passage of a continuous flow of running water toward said basin means, when said first hydraulic chamber (12.2) and said second hydraulic chamber (12.3) are completely filled with pressurized water. - hydraulic connection means (13.1) between a pressurized running water distribution network and a second hydraulic chamber (12.3), which comprises: - first hydraulic communication means between said same second hydraulic chamber (12.3) and said first hydraulic chamber (12.2), including first valve means (14.1) that allow the automatic passage of a continuous flow of pressurized running water from said second hydraulic chamber (12.3) into said first hydraulic chamber (12.2), until said first hydraulic chamber (12.2) is filled with pressurized water, so that said first hydraulic chamber (12.2) maintains said hydraulic cushion (12.1) stably configured as support for said basin means at said convenient height for a person bathing the infant or child, and - second hydraulic communication means, branched from said second hydraulic chamber (12.3) toward said basin means and including second valve means (15.1), which allow the automatic passage of a continuous flow of running water toward said basin means, when said first hydraulic chamber (12.2) and said second hydraulic chamber (12.3) are completely filled with pressurized water. - first hydraulic communication means between said same second hydraulic chamber (12.3) and said first hydraulic chamber (12.2), including first valve means (14.1) that allow the automatic passage of a continuous flow of pressurized running water from said second hydraulic chamber (12.3) into said first hydraulic chamber (12.2), until said first hydraulic chamber (12.2) is filled with pressurized water, so that said first hydraulic chamber (12.2) maintains said hydraulic cushion (12.1) stably configured as support for said basin means at said convenient height for a person bathing the infant or child, and - second hydraulic communication means, branched from said second hydraulic chamber (12.3) toward said basin means and including second valve means (15.1), which allow the automatic passage of a continuous flow of running water toward said basin means, when said first hydraulic chamber (12.2) and said second hydraulic chamber (12.3) are completely filled with pressurized water.