Police are appealing for public help in finding 13-year-old Te Aroha Fowler.
The Caroline Springs teenager was last seen in the Altona area about 2pm on Wednesday.
She is a Maori, about 160 centimetres tall, of medium build, and has brown hair and eyes.
Te Aroha was last wearing a black blazer with a Victoria University Secondary College logo on the front left-hand side, white shirt, and a checkered black, white and teal skirt.
She is known to hang around the Brimbank Shopping Centre and skatepark.
Can you help?
Anyone with information is being urged to call CrimeStoppers on 1800 333 000 or go to crimestoppersvic.com.au.