The hunger striker is an organising secretary and election co-ordinator for the opposition MovementforDemocraticChange (MDC) - led by Morgan Tsvangirai.
Mugabe's ZANU-PF party and the MovementforDemocraticChange, led by Tsvangirai, have failed to implement the September 15 power-sharing deal because they cannot agree on who should control key ministries.
The election would herald the end of the shaky coalition the two leaders formed after the disputed 2008 election, when Mr Tsvangirai - the leader of the MovementforDemocraticChange (MDC) - boycotted a run-off after claiming he had been robbed of victory during the first round.