Micromixer

The invention relates to a micromixer for mixing at least two liquid, viscous or gaseous phases, having one inlet passage for each of the phases, a mixing section, in which the phase flows are crossed and divided one or more times, and an outlet passage for the mixture. The inventive micromixer for mixing liquid, viscous or gaseous phases has a housing bottom part () and a housing top part () which lie closely against each other via connecting surfaces (). Two delivery channels () and an outlet channel () open out into the dividing surface between the two connecting surface (). Channel grooves () which cross each other several times are formed in one connecting surfaces () and provide a mixing section for the phases being mixed.