The invention discloses a light-guiding plate and a manufacturing method thereof. The light-guiding plate includes a light-guiding substrate, a first shielding layer, and a second shielding layer. The light-guiding substrate has a first surface and a second surface opposite to the first surface. The first shielding layer is disposed on the first surface and includes a first light-transmitting portion. The second shielding layer is disposed on the second surface and includes a second light-transmitting portion. Thereby, light emitted from a light source could pass through the first light-transmitting portion, the light-guiding substrate, and the second light-transmitting portion, so that a light-halo phenomenon does not occur on the light-guiding plate.