There is provided a child car seat that can be stably mounted on a seat of a vehicle by means of a simple mounting operation. A child car seat includes: a pedestal to be mounted on a seat of a vehicle, the pedestal including a base part having a front surface and side surfaces, and a standing part standing from the base part; and a seat body supported on the pedestal. The pedestal includes a waist-belt guide part for guiding a waist belt. The waist-belt guide part includes a front guide part extending on the front surface of the base part, and side guide parts continuous to the front guide part and extending on the side surfaces of the base part. The pedestal includes a lateral guide member having a laterally projecting part laterally projecting from the side surface of the base part, and an upwardly extending part extending upwardly from the laterally projecting part. The laterally projecting part forms at least a portion of a lower edge defining a side guide part.