Haryanto will compete alongside Pic.
Rio Haryanto will remain in the GP2 series in 2015 after securing a deal with the Campos Racing team.
The Indonesian, who last year competed in the series with the Caterham team, completes the Spanish team's line-up alongside Arthur Pic.
Twenty-one year-old Haryanto made his GP2 racing debut in 2011 with DAMS. Last year, he finished in 15th place in the standings with 28 points and one podium finish.
"I am very happy to be back in GP2 this year and looking forward to working together with Campos. I feel that Campos Racing is a strong team and are very committed to success and Adrian is a good motivator," Haryanto said.
Team boss Adrian Campos added: "I am very pleased as he is an experienced driver. We are going to give him our full support to deliver good results together".