Antenna device

An antenna device comprising:

• a conductive ground conductor plate;
• a plate-shaped radiating element disposed without being in contact with the ground conductor plate;
• a feeding line including a conductor and a shield member that surrounds the conductor, the shield member being connected to the ground conductor plate;
• a conductive feeding element that includes a facing plate portion that faces the radiating element with a dielectric layer provided in between, and is connected to the conductor;
• a positioning member with which the radiating element and the facing plate portion are positioned;
• and
• a containing recess portion formed in the positioning member and containing the feeding element, wherein
• the containing recess portion includes a front surface recess portion opened to an outer circumference surface of the positioning member and an outer side surface recess portion opened in the outer circumference surface of the positioning member,
• the front surface recess portion and the outer side surface recess portion communicate with each other,
• the facing plate portion is contained in the front surface recess portion, and
• the conductor is contained in the outer side surface recess portion.