A lid lock apparatus for a vehicle includes a retainer, a cap, and a lock pin. The retainer includes a fitting portion to which an end portion of the cap is configured to fit from an outside of the lid box towards an inside of the lid box and a first engaging portion formed to be positioned outward of the lid box relative to the fitting portion. The cap includes an operational lever portion configured to be elastically deformed to tilt by an operation at an outside of the lid box and including a second engaging portion configured to engage with and disengage from the first engaging portion.