Dzmitry Smyk said that his belief did not allow him to bear arms. Judge Alena Tsalkova ruled that "Smyk's actions do not constitute a crime."
Smyk told RFE/RL after he left the courtroom a free man that he felt happy that justice had prevailed.
The Homel prosecutor has 10 days in which to file a motion against the court's decision.
Viktar Adzinochanka, who is a lecturer at Skaryna Religious University and a representative of the Christian Association in Belarus, told RFE/RL that the Belarusian authorities recently adopted a more realistic attitude toward Jehovah's Witnesses.
In Belarus, every male between the age of 18 and 27 has to serve in the army for two years.