How to Tie the Blood Knot [Video & Picture Tutorials]


The Blood Knot

The Blood Knot is a fantastic knot for connecting two lines of similar diameter. It is very sleek and is a favorite among many fishing guides for that very reason.

This knot can be a little bit difficult to tie and therefore practice tying it at home is required before taking it to the water.

In this article, we show you the step-by-step instructions with pictures on how to tie the Blood Knot.

You can also see a detailed video tutorial showing exactly how to tie the blood knot and what the pros and cons of this knot are at the bottom of the article.

Blood Knot Step-by-Step Instructions

Here are the steps for tying the Blood Knot. In this application, we are connecting two pieces of fluorocarbon lines.

Step 1: Overlap 5 Inches of Leader and Main Line

Overlap five inches of leader line and main line and pinch the overlap point.

blood knot step 1

blood knot pinch overlap

Step 2: Make 5-7 Wraps Around the Leader Line With the Tag End of Your Main Line

Make five to seven wraps with the tag end of your main line over the front and around the leader line. Make sure all your wraps move continuously down the leader line.

blood knot wrap

blood knot step 2

Step 3: Put the Tag End of the Main Line Through the “V” at the Overlap Point

Put the tag end of your main line through the “V” the lines create at the overlap point. Cinch the new overlap point using the hand you made the wraps with in Step 2.

Blood Knot Step 3

Blood Knot step 3.1

Step 4: Repeat Steps 2 and 3 Using the Tag End of Your Leader Line

Repeat Steps 2 and 3 using the tag end of your leader to make 5-7 wraps from the back around the main line. Make sure all your wraps move continuously up the main line. Then put the tag end of your leader line through the “V” at the overlap point.

blood knot step 4.1

blood knot step 4

Step 5: Lubricate the Knot and Pull Both Lines and Tag Ends Finger-Tight

Lubricate the knot with water or spit and pull the leader and main lines and both tag ends finger-tight. After pulling the knot finger-tight, release the tag ends and pull the leader and main lines to make the knot as tight as possible. Your tag ends should stick up on either side of the knot at 90-degree angles. 

blood knot step 5.1

blood knot step 5.2

blood knot step 5.3

blood knot step 5.4

Step 6: Cut the Tag Ends

After your knot has coiled together tightly, cut the tag end of each line. Your Blood Knot is complete.

blood knot step 6.1

The Blood Knot

The Blood Knot Video Tutorial

This video tutorial shows you the entire process of how to tie the Blood Knot.

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The Blood Knot is a great knot for connecting lines of similar diameter and is appealing to anglers because of how small and sleek the knot is.

It is also tremendously strong and holds up against the toughest of fish.

There are definitely simpler and easier line-to-line knots you can tie, but the Blood Knot is a great one to add to your arsenal.

If you want to learn more about the best fishing knots, check out our guide to the strongest fishing knots of all time.

If you have any questions or comments about this knot, let us know in the comments section below.

Tight Lines!

Go To Our Knot Testing Homepage [Full Knot Rankings]

Related Posts:

1. How to Tie the Non-Slip Loop Knot [Video & Picture Tutorials]

2. How to Tie the Albright Special Knot [Step-by-Step & Video Tutorial]

3. How to Tie the Crazy Alberto Knot [Video & Step-by-Step]

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10 months ago

I have been having an issue where the fluorocarbon leader line’s wraps are not staying. I have 30 pound main line to 40 pound fluorocarbon leader. It kept slipping so I tied a 65 pound braid leader to my main line and tried the knot again with the thicker braid. It works a bit better but it does not go through guides very well. Would it be better to just use the FG for the connection between the 30lbs main braid to the 40lbs leader of fluorocarbon?

Nate M
2 years ago

Hey y’all,
I noticed you could use a more recent comment. So, here goes. I know I’ve told you most of what I’m about to write before…BUT…I just can’t thank you enough for all the tips & video’s! Even though I’m relatively newly retired to the Myrtle Beach, SC area, currently “boatless” and limited to area on shore, pier and intracoastal waterway, bank & dock fishing, you’ve gotten me quickly ready and comfortable with my newest pastime of saltwater fishing! provided all my know how, tackle, lures and more to land my first decent red! All hail the Slam Shady 2.0 & Luke’s pinky method for an F.G. knot! BTW, I ended up showing your method and tying a few FG’s for some other fishermen & women my last trip to the pier! It helped me learn from the locals who were offering up their secrets as to where & when to use certain rigs. Even gave me extra rigs to copy & try! Know doubt you already know you’ve got something special with Salt Strong! I’m just helping to spread the word. Thanks again!
Best wishes & Tight Lines!

Dave Frymier
5 years ago

I’ve never understood why people would prefer to tie a blood knot to a double uni knot. It may be just a hair thicker, but not much and IIMHO) is so much easier to tie.

4 years ago
Reply to  Dave Frymier

The tag ends never catch on guides. It’s the most functional knot to use honestly. Once you get it right. Even with braid. Just use more wraps with the braid


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