Rescuers on Wednesday pulled a man alive from the rubble five days after Myanmar's devastating earthquake, as calls grew for the junta to allow more aid in and halt attacks on rebels.

The shallow 7.7-magnitude earthquake on Friday flattened buildings across Myanmar, killing more than 2,700 people and making thousands more homeless.

Several leading armed groups fighting the military have suspended hostilities during the quake recovery, but junta chief Min Aung Hlaing vowed to continue "defensive activities" against "terrorists".

UN agencies, rights groups and foreign governments have urged all sides in Myanmar's civil war to stop fighting and focus on helping those affected by the quake, the biggest to hit the country in decades.

Hopes of finding more survivors are fading, but there was a moment of joy on Wednesday as a man was pulled alive from the ruins of a hotel in the capital Naypyidaw.

The 26-year-old hotel worker was extracted by a joint Myanmar-Turkish team shortly after midnight, the fire service and junta said.

Dazed and dusty but conscious, the man was pulled through a hole in the rubble and put on a stretcher, video posted on Facebook by the Myanmar Fire Services Department shows. (AFP)