The heterogeneous contents mixing container includes a first container formed therein with a content storage space and a container coupling space separated from each other; a second container coupled to the first container and formed with an inlet and a coupling portion; a first discharge unit installed in the first container to discharge stored contents; a second discharge unit installed in the second container to discharge stored contents; and a push button configured to operate the first and second discharge units and formed with first and second discharge passages and first and second outlets which are connected to the first and second discharge units, respectively, wherein the container coupling space of the first container and the inlet and the coupling portion of the second container deviate to one side from a center between the first and second containers, and the second discharge is connected to the second discharge passage.