A micro mixer for liquid, viscous or gaseous phases with two adjacent housing parts (1, 2) disposed on a parting plane (3). Capillary tubes (7) forming line connections are inserted into cross holes (6) in the top part of the housing (1) by welding, for instance, and run into the parting plane (3). The other free ends of the capillary tubes (7) are bent apart and respectively bear a screw connection.
