The Netherlands midfielder suffered a torn anterior cruciate ligament while playing in a Serie A clash against Napoli in March.
The injury caused him to miss the remainder of the domestic season, as well as the World Cup in Brazil, but the 24-year-old is now closing in on a return to the first team.
"The big news: @Kevin_strootman is back in training with his team-mates for today's session. Welcome back! #ForzaKevin," the club posted on its official Twitter account, along with a picture of the Dutchman in action.
Manchester United have been linked with a move for Strootman, but Roma have insisted that he is not for sale.
He could face renewed competition for a place in the starting XI upon his return, with Paris Saint-Germain midfielder Adrien Rabiot revealing he is close to sealing a January move to the Stadio Olimpico.