Tackle Index
Knot

Surgeon's Loop

A fixed loop in the end of a line.

Last reviewed 26 September 2026 · Editorial policy

At a glance

What this knot is for

Joins
A fixed loop in the end of a line
Line types
Monofilament and fluorocarbon. Usable with braid but a non-slip loop is generally cleaner for braid.

Reach for it when

  • Fast loop-to-loop leader connections
  • Attaching a dropper or a lure that needs some free movement
Method

How to tie the surgeon's loop

  1. 1Double the last 10–15cm of line back on itself to form a loop.
  2. 2Tie an overhand knot in the doubled line, leaving the loop open.
  3. 3Pass the loop through the overhand knot a second time to form a double overhand knot.
  4. 4Moisten and pull the loop and the standing line apart to close the knot down, keeping the loop size you want.
  5. 5Trim the tag end if there is excess.
Surgeon's LoopDiagram: Tackle Index

Work on a flat surface with enough line in your hand to pull the knot down firmly, and check the wraps sit neatly before you trim anything away.

Why it works

  • Extremely quick to tie, even in the field
  • Makes loop-to-loop leader changes fast without re-tying the main line

Where it lets you down

  • Weaker than a properly tied non-slip loop for lure presentation, since it does not allow the same free swing
  • Bulky compared with slimmer loop knots
Shop

The tackle this knot ties

The knot itself costs nothing — it joins your line to the tackle you buy. This search shows the general category this knot is tied onto, never a named brand or model.

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Alternatives

Knots that do a similar job

Perfection Loop →Figure-of-Eight Loop →
Used in

Fishing methods that use this knot

Fly Fishing →Float Fishing →
Keep going

More knots worth learning

Improved Clinch Knot →Palomar Knot →Uni Knot →Double Uni Knot →Blood Knot →Surgeon's Knot →Figure-of-Eight Loop →Perfection Loop →
Check the rules where you fish
Some waters restrict tackle or methods — barbless hooks, lead sinkers, certain rigs and line types. Confirm the rules of the water you are fishing before you use any rig or knot.