Two men on a motorcycle on Tuesday fired at and threw bricks at the residence of Somsak Jeamteerasakul, a Thammasat University lecturer who is known for his criticism of the monarchy.
Somsak wrote on his Facebook that two men raided his house in the morning before shooting and throwing the bricks.
The attack was conducted in front of himself and his neighbours, he wrote. He also posted photos of the damage to his car and the windows of the house that had been shattered by the bullets and bricks.
He received mixed reactions from people sharing their views in the comment box.