A sanitary washing apparatus for bottom washing by jetting water from a jetting hole of a nozzle toward human private parts, the apparatus comprising: jetting means configured to jet water in a hollow conic shape from the jetting hole; liquid film fracturing means configured to generate granulated water flows by fracturing a liquid film of the water jetted in the hollow conic shape to pour the granulated water flows into a hollow portion of the water jetted in the hollow conic shape before the water jetted in the hollow conic shape from the jetting hole impinges on the human private parts; and liquid film thickness expanding means provided on downstream side of the jetting means and on upstream side of the jetting hole and configured to make thickness of the liquid film of the water jetted in the hollow conic shape from the jetting hole thicker than thickness of a liquid film of the water jetted in the hollow conic shape from the jetting means, characterized in that the sanitary washing apparatus further comprises: means for rendering the granulated water flows to include a first water flow group, and a second water flow group having a smaller particle diameter and a slower flow velocity than the first water flow group; means for impinging the first water flow group and the second water flow group independently on the human private parts at a given time interval; means for impinging the first water flow group on an outer peripheral part of the human private parts and the second water flow group on a central part of the human private parts; and pulsation generating means provided on an upstream side of the jetting means and configured to provide pulsation to the water jetted from the jetting hole to produce alternately the first water flow group and the second water flow group. jetting means configured to jet water in a hollow conic shape from the jetting hole; liquid film fracturing means configured to generate granulated water flows by fracturing a liquid film of the water jetted in the hollow conic shape to pour the granulated water flows into a hollow portion of the water jetted in the hollow conic shape before the water jetted in the hollow conic shape from the jetting hole impinges on the human private parts; and liquid film thickness expanding means provided on downstream side of the jetting means and on upstream side of the jetting hole and configured to make thickness of the liquid film of the water jetted in the hollow conic shape from the jetting hole thicker than thickness of a liquid film of the water jetted in the hollow conic shape from the jetting means, characterized in that the sanitary washing apparatus further comprises: means for rendering the granulated water flows to include a first water flow group, and a second water flow group having a smaller particle diameter and a slower flow velocity than the first water flow group; means for impinging the first water flow group and the second water flow group independently on the human private parts at a given time interval; means for impinging the first water flow group on an outer peripheral part of the human private parts and the second water flow group on a central part of the human private parts; and pulsation generating means provided on an upstream side of the jetting means and configured to provide pulsation to the water jetted from the jetting hole to produce alternately the first water flow group and the second water flow group. means for rendering the granulated water flows to include a first water flow group, and a second water flow group having a smaller particle diameter and a slower flow velocity than the first water flow group; means for impinging the first water flow group and the second water flow group independently on the human private parts at a given time interval; means for impinging the first water flow group on an outer peripheral part of the human private parts and the second water flow group on a central part of the human private parts; and pulsation generating means provided on an upstream side of the jetting means and configured to provide pulsation to the water jetted from the jetting hole to produce alternately the first water flow group and the second water flow group.