Biosecurity Act 1993 is an Act of Parliament in New Zealand.

The Act is a restatement and reform of the laws relating to pests and other unwanted organisms.

[1] It was a world first.

[2] In the Act an "unwanted organism" is defined as one that "is capable or potentially capable of causing unwanted harm to any natural and physical resources or human health" and a "restricted organism" means "any organism for which a containment approval has been granted in accordance with the Hazardous Substances and New Organisms Act 1996".

Part 5 of the Act provides for national pest management plans and regional pest management plans.