A vehicle lighting unit (1, 5) comprising: a housing having an opening; an outer lens that covers the opening of the housing to define a lighting chamber together with the housing; a light emitting element serving as a light source having an optical axis; and a light guiding lens having a front surface and a rear surface in part of which a first cut is formed, the light guiding lens being configured to guide the light emitted from the light emitting element while totally reflecting the light to cause the light to exit the light guiding lens by the first cut, the lighting chamber containing the light emitting element and the light guiding lens, and the light guiding lens including an aesthetic portion, the aesthetic portion having a first region where the first cut is formed and a second region, the light guiding lens is configured such that a second cut is formed in the front surface of the aesthetic portion of the light guiding lens at the second region where no first cut is formed in the rear surface of the light guiding lens, wherein the light guiding lens further includes a horizontal portion extending along the optical axis of the light emitting element towards the outer lens on a front side of the vehicle lighting unit (1, 5), the horizontal portion including a light incident surface which is positioned on a rear side of the vehicle lighting unit (1, 5) and on which the light emitted from the light emitting element is incident, the aesthetic portion has the second region as a curved portion which is connected to the horizontal portion and in which the second cut is formed in the front surface of the light guiding lens, the light guiding lens is in a round bar shape, the outer lens is disposed in front of the aesthetic portion and a front portion of the horizontal portion opposite to the light incident surface, a part of the light guided through the horizontal portion exits through the second region, at which the second cut is formed, toward the outer lens, another part of the light guided through the horizontal portion and the aesthetic portion exits through the first region due to the first cut toward the outer lens. a housing having an opening; an outer lens that covers the opening of the housing to define a lighting chamber together with the housing; a light emitting element serving as a light source having an optical axis; and a light guiding lens having a front surface and a rear surface in part of which a first cut is formed, the light guiding lens being configured to guide the light emitted from the light emitting element while totally reflecting the light to cause the light to exit the light guiding lens by the first cut, the lighting chamber containing the light emitting element and the light guiding lens, and the light guiding lens including an aesthetic portion, the aesthetic portion having a first region where the first cut is formed and a second region, the light guiding lens is configured such that a second cut is formed in the front surface of the aesthetic portion of the light guiding lens at the second region where no first cut is formed in the rear surface of the light guiding lens, wherein the light guiding lens further includes a horizontal portion extending along the optical axis of the light emitting element towards the outer lens on a front side of the vehicle lighting unit (1, 5), the horizontal portion including a light incident surface which is positioned on a rear side of the vehicle lighting unit (1, 5) and on which the light emitted from the light emitting element is incident, the aesthetic portion has the second region as a curved portion which is connected to the horizontal portion and in which the second cut is formed in the front surface of the light guiding lens, the light guiding lens is in a round bar shape, the outer lens is disposed in front of the aesthetic portion and a front portion of the horizontal portion opposite to the light incident surface, a part of the light guided through the horizontal portion exits through the second region, at which the second cut is formed, toward the outer lens, another part of the light guided through the horizontal portion and the aesthetic portion exits through the first region due to the first cut toward the outer lens.