"Lakshman Mahato was arrested from Kusumghati village in Jhargram police station for removing the pandrol clips which holds the railway tracks with the sleepers,"said CBI officials.
He is the 10th person arrested in the case, the police said, adding the pro-Maoist activist was being interrogated.
This is the first arrest made by CBI in Gyaneshwari train accident the investigation of which was handed over to the premier probe agency from the CID.
Mumbai bound Howrah-Kurla Gyaneshwati Express train collided with a goods train following blast near Jhargram in West Bengal's West Midanpore District on May 28.
148 passengers were killed and 200 people were injured in the train mishap.