To provide a lamp with a base capable of getting close to light-distribution characteristics of existing light sources such as an incandescent lamp, and a lighting fixture.

The lamp 10 with a base has a body 11, and a light source section 12 wherein a solid light-emitting element 12a is arranged in a plane state is arranged at one end of the body 11. A translucent cover member 13 has a dent section 13c formed so as to expand outward at an outer face side by making a plurality of reflecting surfaces 13b with an approximately polygonal shape continuously inclined in an optical axis x-x and in a peripheral direction approximately orthogonal to the optical axis at a light-emitting side of a light introduction section 13a arranged in opposition to the light source section 12, and is arranged so as to cover the light source section 12. A base member 14 is arranged on the other end of the body 11.