The fishermen, who had been languishing in prison for the last two and half years, were released from Landhi Jail and will be handed over to Indian authorities at the Wagah border.
Faisal Edhi, who heads private charity the Edhi Foundation, arranged the train journey for the fishermen today and gave them gifts and some cash.
Jail superintendent of Landhi Jail Shakir Shah told PTI that 86 more Indian fishermen would be released on March 20.
Fishermen are frequently arrested along with their boats by both India and Pakistan as the maritime border in the Arabian Sea is poorly defined, and many fishing boats lack the technology needed to be certain of their precise location.
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Some of them spend years in jail before being repatriated.
In the past the two nations have released each other's fishermen as goodwill gestures.
Although in December, India and Pakistan had agreed to revive the dialogue process when External Affairs Minister Sushma Swaraj visited Islamabad for a summit, but the same month 66 Indian fishermen were arrested by Pakistan.