Prime Minister Prayuth Chan-ocha, who led a military coup inMay, had previously hinted at a delay to polls promised for late 2015.
Prawit said elections will take place in 2016, citing groups opposed to the junta, or National Council for Peace and Order as one reason for the delay.
"We will be able to organise elections around the start of 2016 once the constitution is drafted," Prawit told reporters.
"Right now there are elements opposed to the National Council for Peace and Order.