Sodium hydroselenide is an inorganic compound with the chemical formula NaSeH.

Each unit consists of one sodium, one selenium, and one hydrogen atom.

Sodium hydroselenide can be made by reducing selenium with sodium borohydride: Alternatively it can be made from sodium ethoxide exposed to hydrogen selenide:[1] Sodium hydroselenide is not made for storage, instead it is used immediately after production in a fume hood thanks to the appalling odour of hydrogen selenide.

Sodium hydroselenide dissolves in water or ethanol.

[1] In organic synthesis, hydrogen sodium hydroselenide is a nucleophillic agent for insertion of selenium.