To provide a check valve that significantly prevents the quality of fluid to be dispensed from being deteriorated, and can eliminate waste and complexity during dispensing, and to provide a container using the same.

The check valve for resisting the resiliency of an resilient body by the pressure of a fluid, in which a valve body facing a valve seat of a check valve body opens/closes, includes: a first valve seat formed on a side of a fluid inlet to face a first valve body; and a second valve seat formed on a side of a fluid outlet to face a second valve body, wherein the second valve body is directly or indirectly connected to the first valve body. The container adopts the check valve at the neck part of the container.