Vehicle interior lighting device comprising a LED module and a light guide, the light guide comprising: - a light guide main body (2.1), - a light guide coupling end (2.11) having a longitudinal axis, comprising: - light guide counter-retention means (2.12) and, - light guide counter-angular position fixing means (2.13); the LED module comprising: - a PCB with a LED, the LED mounted on one face of such PCB and the LED having a light beam axis; - a LED module housing (1.1) comprising: - a body (1.2), housing the PCB, comprising PCB attaching means (1.21) in the interior of the LED module for attaching the PCB; - a tubular coupling portion (1.3) for optically coupling the light guide coupling end (2.11) and the LED, and for attaching the light guide coupling end (2.11) to the tubular coupling portion (1.3), wherein said tubular coupling portion (1.3) protrudes from the body (1.2), and having a longitudinal axis, comprising a light guide housing wall (1.32) surrounding a portion of the light guide, comprising: - light guide retention means (1.33), - light guide angular position fixing means (1.34); wherein the PCB attaching means (1.21) and the light guide housing wall (1.32) are arranged for providing a 90° degrees coupling between the PCB and the longitudinal axis of the light guide coupling end (2.11) and an alignment between the longitudinal axis of the tubular coupling portion (1.3) and the light beam axis of the LED; wherein the LED module and the light guide are configured to be mounted in an assembly direction, which is coincident with the longitudinal axis of the light guide coupling end (2.11) and the longitudinal axis of the tubular coupling portion (1.3); the light guide counter-retention means (2.12) collaborate with the light guide retention means (1.33) for providing an outwards retention in the assembly direction; characterized in that the light guide housing wall (1.32) is radially fully closed, includes a wall portion (1.35) surrounding the light guide retention means (1.33) and such wall portion (1.35) is thinner than the light guide housing wall (1.32) providing the light guide retention means (1.33) are radially floating, in such a way the light guide retention means (1.33) can move outward and inward following a radial direction of the light guide housing wall (1.32). - a light guide main body (2.1), - a light guide coupling end (2.11) having a longitudinal axis, comprising: - light guide counter-retention means (2.12) and, - light guide counter-angular position fixing means (2.13); - light guide counter-retention means (2.12) and, - light guide counter-angular position fixing means (2.13); - a PCB with a LED, the LED mounted on one face of such PCB and the LED having a light beam axis; - a LED module housing (1.1) comprising: - a body (1.2), housing the PCB, comprising PCB attaching means (1.21) in the interior of the LED module for attaching the PCB; - a tubular coupling portion (1.3) for optically coupling the light guide coupling end (2.11) and the LED, and for attaching the light guide coupling end (2.11) to the tubular coupling portion (1.3), wherein said tubular coupling portion (1.3) protrudes from the body (1.2), and having a longitudinal axis, comprising a light guide housing wall (1.32) surrounding a portion of the light guide, comprising: - light guide retention means (1.33), - light guide angular position fixing means (1.34); - a body (1.2), housing the PCB, comprising PCB attaching means (1.21) in the interior of the LED module for attaching the PCB; - a tubular coupling portion (1.3) for optically coupling the light guide coupling end (2.11) and the LED, and for attaching the light guide coupling end (2.11) to the tubular coupling portion (1.3), wherein said tubular coupling portion (1.3) protrudes from the body (1.2), and having a longitudinal axis, comprising a light guide housing wall (1.32) surrounding a portion of the light guide, comprising: - light guide retention means (1.33), - light guide angular position fixing means (1.34); - light guide retention means (1.33), - light guide angular position fixing means (1.34); wherein the LED module and the light guide are configured to be mounted in an assembly direction, which is coincident with the longitudinal axis of the light guide coupling end (2.11) and the longitudinal axis of the tubular coupling portion (1.3); the light guide counter-retention means (2.12) collaborate with the light guide retention means (1.33) for providing an outwards retention in the assembly direction; characterized in that the light guide housing wall (1.32) is radially fully closed, includes a wall portion (1.35) surrounding the light guide retention means (1.33) and such wall portion (1.35) is thinner than the light guide housing wall (1.32) providing the light guide retention means (1.33) are radially floating, in such a way the light guide retention means (1.33) can move outward and inward following a radial direction of the light guide housing wall (1.32).