17-year-old Jacob Barr of Allouez is charged with four counts, including Aggravated Battery.
Police say Barr and his 16-year-old girlfriend were visiting a friend on Kellogg Street in Green Bay early Saturday morning.
The couple apparently had an argument. That's when Barr allegedly beat the girl. Police say he then stabbed her in the stomach with a knife.
Barr then ran off. Police say they later found him with a knife.
The girl took herself to the hospital. She suffered non-life threatening injuries.