A parcel box for receiving and keeping parcels in a theftproof manner has a box having a drawer that can be pulled out and pushed in, and a theft prevention mechanism that prevents unauthorized removal of parcel. The theft prevention mechanism has a platform configured to have parcel disposed thereon, a blocking mechanism that blocks pulling out of the drawer from the box when the parcel is placed on the platform, and an unblocking mechanism for unblocking the drawer. The drawer is swingable about a pivot axle fixed in the box. The drawer has a left side wall, a right side wall, an outer wall, and an inner wall. The platform has a first end and a second end situated opposite each other. The platform is swingable about a cross pivot axle fixed in the drawer.