The present invention relates to a content receiving device, an opening/closing mechanism, and a container mechanism comprising the same, the content receiving device comprising: a housing which opens to both sides applied to a container body; and an operating mechanism for controlling passage of content provided on the housing to move and guide contents, wherein the operating mechanism has an opening formed to communicate with a storage portion of the container body such that contents of the storage portion are moved. The present invention not only secures a content passage space, but also adjusts the passage space and a receiving space, thereby limiting reception of contents; passage of the demand amount of contents is stably induced within a predetermined range; and contents are prevented from remaining more than is needed, together with interlocked limitation of the content receiving space, such that the amount of received contents is adjusted.