Exhaust gas cooler

The present invention relates to an exhaust gas cooler (1), in particular for an exhaust gas recirculation system of an internal combustion engine, preferably of a motor vehicle, comprising an exhaust gas inlet (2) which is connected in a communicating manner with an inlet chamber (4), an exhaust gas outlet (3) which is connected in a communicating manner with an outlet chamber (5), a plurality of exhaust gas pipes (7) which are configured as flat pipes, extend parallel to each other through a coolant chamber (8) and are connected in a communicating manner on one side to the inlet chamber (4) and on the other side to the outlet chamber (5), a coolant inlet (9) which is connected in a communicating manner to the coolant chamber (8), and a coolant outlet (10) which is connected in a communicating manner to the coolant chamber (8). The exhaust gas pipes (7) have on mutually opposite sides (28) a plurality of outwardly projecting protrusions (29) which are spaced apart from each other in the longitudinal direction (30) of the exhaust gas pipes (7). A simplified cooling effect can be achieved if, with in each case two adjacent exhaust gas pipes (7), the protrusions (29) of one exhaust gas pipe (7) bear in each case directly against the other exhaust gas pipe (7) at a distance in the longitudinal direction (30) of the exhaust gas pipes (7) from the nearest protrusion (29) of the other exhaust gas pipe (7).