diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf28321..db03fb6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ### Added
+- PostGIS ST_LineSubstring support
 - PostGIS ST_LineFromEncodedPolyline support
 - PostGIS ST_LineLocatePoint support
 
diff --git a/src/Database/PostgisFunctions/MagellanGeometryProcessingFunctions.php b/src/Database/PostgisFunctions/MagellanGeometryProcessingFunctions.php
index 96e89e6..6dc78af 100644
--- a/src/Database/PostgisFunctions/MagellanGeometryProcessingFunctions.php
+++ b/src/Database/PostgisFunctions/MagellanGeometryProcessingFunctions.php
@@ -198,6 +198,17 @@ public static function lineMerge($geometry, bool|Expression|\Closure|null $direc
         return MagellanBaseExpression::geometry('ST_LineMerge', [GeoParam::wrap($geometry), $directed]);
     }
 
+    /**
+     * Computes the line which is the section of the input line starting and ending at the given fractional locations. The first argument must be a LINESTRING. The second and third arguments are values in the range [0, 1] representing the start and end locations as fractions of line length. The Z and M values are interpolated for added endpoints if present.
+     *
+     *
+     * @see https://postgis.net/docs/ST_LineSubstring.html
+     */
+    public static function lineSubstring($geometry, float|Expression|\Closure $startFraction, float|Expression|\Closure $endFraction, ?GeometryType $geometryType = null): MagellanGeometryExpression
+    {
+        return MagellanBaseExpression::geometry('ST_LineSubstring', [GeoParam::wrap($geometry), $startFraction, $endFraction], $geometryType);
+    }
+
     /**
      * Returns the smallest circle polygon that contains a geometry.
      *