To provide a packaging container with improved safety, having a childproof function configured such that a child or the like, including an infant, hardly recognizes a notch formation position in a container un-opened state and the container cannot be easily opened.

Peripheries of a pair of body materials 2 holding contents 5 therein are heat sealed h to form a storage part 4 storing the contents 5. A notch is formed in a portion of the heat seal h (heat seal part 3) being a portion of the peripheries. A covering providing means 7 is provided, by which the notch cannot be visually recognized from the outside when the packaging container 1 is not opened and the notch is exposed when the packaging container is to be opened.