The ranat ek lek (Thai: ระนาดเอกเหล็ก, pronounced [ranâːt ʔèːk lèk]) is a metallophone used in the classical music of Thailand.

It is the smaller of the two sizes of Thai metallophone; the larger one is called ranat thum lek.

This musical instrument was originated in the reign of King Rama IV (1854-1868).

[1] The ranat ek lek consists of flat metal slabs placed over a rectangular wooden resonator.

The ranat ek lek is very similar to the Khmer roneat dek.