Abstract: A packing box made up of a plastic material is disclosed. The packing box has a cover with a first rim formed around the cover. A container is integrated with the cover. The container has a second rim formed around the container. A ridge is formed between the cover and the container to connect them together. The ridge has two tapered portions formed at two distal ends thereof. Two arcuate protective borders extend from the cover and are respectively formed beside and spaced apart from the ridge. Each of gaps between the ridge and the protective borders is narrower than a normal finger.

Abstract: A packing box is composed of a cover and a container, and a ridge connecting the cover and the container. The cover has a cap formed at a top thereof. A first step is formed under the cap and with an upper surface and a wall. Two notches are respectively defined in the cap at two corners to form two pressed portions on the upper surface. A first rim is formed around the first step. Two first triangular portions are respectively formed on the first rim at the corners. The container has a second step corresponding to the first step. A second rim is formed around the second step. Two second triangular portions are respectively formed on the second rim and corresponding to the first triangular portions.