The invention aims at provision of an engine device structured such that an attachment position of a support base (87) can be simply determined by coupling an exhaust gas outlet surface (7a) of an engine (1) and the support base (87), and it is possible to improve an assembly workability of the support base (87). The engine device of the present invention is provided with a first case (28) which removes particulate matters in exhaust gas of an engine (1), and a second case (29) which removes nitrogen oxides in the exhaust gas of the engine (1). The second case (29) is connected to the first case (28) via a urea mixing pipe (39). An exhaust gas inlet surface (34a) of the first case (28) is joined to an exhaust gas outlet surface (7a) of the engine (1), and a support base (87) firmly fixed to the engine (1) is provided. The support base (87) is partly brought into surface contact with the exhaust gas outlet surface (7a) of the engine (1).
