Haplinis attenuata is a species of sheet weaver spider endemic to New Zealand.
This species was described in 2002 by A.D Blest and Cor Vink from male and female specimens. The holotype is stored at Te Papa Museum under registration number AS.000848.
The male is recorded at 6.00mm in length, whereas the female is 6.75mm. This species has a dark brown prosoma and legs. The abdomen is grey laterally.
This species is known throughout New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Naturally Uncommon" with the qualifier "Biologically Sparse".