Over 1,000 people have been killed and nearly 7,000 have been hurt in the quake, which measured 6.7 on the Richter scale.
Thousands of people have been left without homes, food or water.
Hospitals are finding it hard to cope with all the injured and many people are being treated out in the open air.
The earthquake hit the African country on Wednesday and could be felt as far away as Ibiza.
Many locals are angry that so many buildings just collapsed in the shaking. They say they weren't built well enough to cope with quakes.
Countries which are hit regularly by earthquakes have to make sure buildings are built to certain safety levels.
The earthquake is the worst one to hit Algeria in more than 20 years.