Housing box

A housing box comprising:

• a main body portion having an opening portion capable of housing electronic components therein and communicating between an inside and an outside;
• a cover portion attached to the main body portion and detachably attached to the opening portion;
• and
• a resin packing member that is provided in the cover portion, disposed at least in a water stop region between the main body portion and the cover portion, and performs water stop between the main body portion and the cover portion, wherein
• the cover portion has a top surface portion that covers the opening portion and a lower wall portion that extends downward from an outer edge of the top surface portion, a groove is formed in a lower portion of the lower wall portion, and
• the packing member is provided in a groove and has a resin injection portion that is formed in a non-water stop region deviated from the water stop region and that serves as a resin injection position during resin molding.