Provided are an antenna and a combination antenna having a wide directivity in a predetermined plane direction. The antenna 100 is configured to have rims 111, 112 at left and right ends of a dielectric substrate 101 in the X direction in such a manner as to sandwich antenna elements 10. The rims 111, 112 may be metal plates or EBGs. As the rims 111, 112 are thus provided at both sides to sandwich the antenna elements 10, it is possible to reduce the width of the dielectric substrate 101 of the antenna 100 required for realizing wide coverage. As a result, it is possible to create a greater space for integration of another RF circuit and improve the space factor.