Andersonia pinaster is a species of flowering plant in the family Ericaceae and is endemic to the south of Western Australia.

It is a slender, erect, pine-like shrub with twisted, narrowly egg-shaped to almost linear leaves and bright blue, tube-shaped flowers.

[2][3] Andersonia pinaster was first formally described in 2007 by Kristina L. Lemson in the journal Nuytsia from specimens collected near Betty's Beach by Greg Keighery in 1986.

[2][4] The specific epithet (pinaster) refers to the habit of mature plants, which resemble a small pine tree.

[2] This species of Andersonia grows in low heath in Two Peoples Bay Nature Reserve in the Jarrah Forest bioregion of southern Western Australia.