A lighting device comprising: a light source having a light-emitting surface; a reflector having a reflective surface configured to reflect light emitted from the light source; and a lens on which light reflected by the reflective surface is incident, wherein: the reflective surface is composed of a portion of a spheroidal surface that includes a first focal point located on the light-emitting surface and a second focal point located between the reflective surface and the lens, the reflective surface intersects a major axis of the spheroidal surface, a value obtained by dividing a first distance, which is a distance between the first focal point and the second focal point, by a second distance, which is a distance between the first focal point and an intersection point of the reflective surface and the major axis, is 7 or greater, and a maximum dimension of the lens in a first direction in which a normal line extends at a center of the light-emitting surface is 20 mm or less, or a lens on which light reflected by the reflective surface is incident, wherein: the reflective surface has a shape obtained by combining portions of outer peripheries of a plurality of ellipses, a first focal point of each of the plurality of ellipses is located on the light-emitting surface, a second focal point of each of the plurality of ellipses is located between the reflective surface and the lens, a major axis of (i) a first ellipse that has a shortest distance between the first focal point and the second focal point among the plurality of ellipses, intersects (ii) the reflective surface, a value obtained by dividing a first distance, which is a distance between the first focal point and the second focal point of the first ellipse, and a second distance, which is a distance between the first focal point of the first ellipse and an intersection point of the reflective surface and the major axis, is 7 or greater, and a maximum dimension of the lens in a first direction in which a normal line extends at a center of the light-emitting surface is 20 mm or less. a light source having a light-emitting surface; a reflector having a reflective surface configured to reflect light emitted from the light source; and a lens on which light reflected by the reflective surface is incident, wherein: the reflective surface is composed of a portion of a spheroidal surface that includes a first focal point located on the light-emitting surface and a second focal point located between the reflective surface and the lens, the reflective surface intersects a major axis of the spheroidal surface, a value obtained by dividing a first distance, which is a distance between the first focal point and the second focal point, by a second distance, which is a distance between the first focal point and an intersection point of the reflective surface and the major axis, is 7 or greater, and a maximum dimension of the lens in a first direction in which a normal line extends at a center of the light-emitting surface is 20 mm or less, or the reflective surface is composed of a portion of a spheroidal surface that includes a first focal point located on the light-emitting surface and a second focal point located between the reflective surface and the lens, the reflective surface intersects a major axis of the spheroidal surface, a value obtained by dividing a first distance, which is a distance between the first focal point and the second focal point, by a second distance, which is a distance between the first focal point and an intersection point of the reflective surface and the major axis, is 7 or greater, and a maximum dimension of the lens in a first direction in which a normal line extends at a center of the light-emitting surface is 20 mm or less, or a lens on which light reflected by the reflective surface is incident, wherein: the reflective surface has a shape obtained by combining portions of outer peripheries of a plurality of ellipses, a first focal point of each of the plurality of ellipses is located on the light-emitting surface, a second focal point of each of the plurality of ellipses is located between the reflective surface and the lens, a major axis of (i) a first ellipse that has a shortest distance between the first focal point and the second focal point among the plurality of ellipses, intersects (ii) the reflective surface, a value obtained by dividing a first distance, which is a distance between the first focal point and the second focal point of the first ellipse, and a second distance, which is a distance between the first focal point of the first ellipse and an intersection point of the reflective surface and the major axis, is 7 or greater, and the reflective surface has a shape obtained by combining portions of outer peripheries of a plurality of ellipses, a first focal point of each of the plurality of ellipses is located on the light-emitting surface, a second focal point of each of the plurality of ellipses is located between the reflective surface and the lens, a major axis of (i) a first ellipse that has a shortest distance between the first focal point and the second focal point among the plurality of ellipses, intersects (ii) the reflective surface, a value obtained by dividing a first distance, which is a distance between the first focal point and the second focal point of the first ellipse, and a second distance, which is a distance between the first focal point of the first ellipse and an intersection point of the reflective surface and the major axis, is 7 or greater, and a maximum dimension of the lens in a first direction in which a normal line extends at a center of the light-emitting surface is 20 mm or less.