Thailand's economy grew less than expected in October-December and had full-year 2014 growth of only 0.7 percent, as exports and consumption remained weak long after a May coup aimed at helping to spur recovery.
The poor performance in 2014 will put more pressure on the military junta to speed up infrastructure spending this year to lift growth in Southeast Asia's second-largest economy.
The economy grew 1.7 percent in final quarter of 2014 on a seasonally-adjusted basis from the prior three months, and 2.3 percent from a year earlier, the state planning agency said on Monday.
Economists in a Reuters poll had forecast quarterly growth of 2.3 percent in October-December, and an annual pace of 2.4 percent.
The full-year growth was the weakest since flood-hit 2011.
In 2013, there was 2.9 percent expansion.