A continuous mixer for lighting of the mortar, in particular ready-made dry mortars, with water, with– a mixer (14), comprising a material input opening (12) for the mortar, an inlet (22) for water and a material outlet (32) for the mortar, mixed with water has,– a dosing unit (30) for metering the quantity of water per unit of,– a with the material outlet (32) of the mixing apparatus (14) coupled pump (34) for conveying of the mixed mortar and– a switching unit (48) with a switching operating element (46) for switching over of the dosing unit (30) and / or of the pump (34) between a first and a second operating mode, wherein in the first operating mode, the quantity of water per unit time is greater and / or the delivery capacity of the pump (34) is smaller than in the second operating mode is.
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