Carrying a Knife in Queensland — What Is a Lawful Excuse?
Weapons — 2026-06-20 — by Sacha Sarah Smith, Civic Law
Charged with carrying a knife in public in Queensland? What the law says, what counts as a lawful excuse, and what does not.
You were carrying a knife — your work knife, a pocketknife, a fishing knife, a multitool — and now you are facing a charge under section 51 of the <em>Weapons Act 1990</em> (Qld). The charge is possessing a knife in a public place without a reasonable excuse.
The offence itself is simple: you had a knife in a public place. The question that decides whether you are guilty or not is whether you had a lawful reason to have it on you at the time.
The Offence
Section 51(1) makes it an offence to physically possess a knife in a public place or a school, unless you have a reasonable excuse for carrying it.
"Public place" is broad. It covers roads, footpaths, parks, shopping centres, licensed venues, and anywhere the public has access to. If you were outside your own home with a knife, you were almost certainly in a public place.
The maximum penalty for a first offence is 50 penalty units or 18 months imprisonment. For a second offence, that increases to 100 penalty units or 2 years. If you posted about the offence on social media, the penalties are higher again.
What Counts as a Reasonable Excuse
The law recognises four categories of lawful reason for carrying a knife in a public place. If your reason fits one of them, you have a defence:
<strong>Work.</strong> You carry the knife for your job — you are a tradesperson with a utility knife on your belt, a chef transporting kitchen knives, a farm worker using a knife for primary production. The knife must have a genuine connection to the work you are doing or travelling to.
<strong>Recreation or sport.</strong> You are a fisher carrying a fillet knife, a scout carrying a knife as part of uniform, a diver with a diving knife. The recreational purpose must be genuine and current — not something you did last week.
<strong>Lawful exhibition.</strong> You are displaying knives at a market or a public gathering. Less common, but it is in the Act.
<strong>General lawful purpose.</strong> You are using a knife to prepare food at a picnic, or you carry a penknife or Swiss army knife for its normal everyday uses. The <em>Weapons Act</em> specifically mentions Swiss army knives and penknives as examples of knives carried for a lawful purpose. A small folding knife or multitool carried as a genuine utility item falls within this category.
Self-Defence Is Not a Reasonable Excuse
This catches people. Section 51(4) says it explicitly: carrying a knife for self-defence is not a reasonable excuse. It does not matter that you feel unsafe, that you have been threatened, or that you live in an area where you feel you need protection. If self-defence is the reason you had the knife, you do not have a defence.