diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlAstBuilder.java b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlAstBuilder.java
index a4894804b..bc809d71a 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlAstBuilder.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlAstBuilder.java
@@ -1334,6 +1334,8 @@ public TermAst termFromBuiltInCall(fr.inria.corese.core.next.impl.parser.antlr.S
                 return this.createConstraint(ASTConstants.FUNCTION_CALL.BOUND, List.of(this.var(ctx.var_().getText())));
             } else if (ctx.regexExpression() != null) {
                 return termFromRegex(ctx.regexExpression());
+            } else if (ctx.STRLEN() != null) {
+                return new StrLenAst(args.getFirst());
             } else {
                 throw new QueryEvaluationException("Unexpected function for a  BuiltInCall for token " + ctx.getText());
             }
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/parser/semantic/support/VariableScopeAnalyzer.java b/src/main/java/fr/inria/corese/core/next/query/impl/parser/semantic/support/VariableScopeAnalyzer.java
index c2e353b37..fe3e8e230 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/parser/semantic/support/VariableScopeAnalyzer.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/parser/semantic/support/VariableScopeAnalyzer.java
@@ -197,6 +197,8 @@ case NotInAst(TermAst left, List<TermAst> candidates) -> {
                 }
             }
 
+            case StrLenAst(TermAst argument) -> collectReferencedVariables(argument, referencedVariables);
+
             case ConstraintAst ignored -> {
                 // Other constraint shapes are ignored until they are supported here.
             }
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/constraint/StrLenAst.java b/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/constraint/StrLenAst.java
new file mode 100644
index 000000000..36a52b00d
--- /dev/null
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/constraint/StrLenAst.java
@@ -0,0 +1,10 @@
+package fr.inria.corese.core.next.query.impl.sparql.ast.constraint;
+
+import fr.inria.corese.core.next.query.impl.sparql.ast.ConstraintAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.TermAst;
+
+/**
+ * Function {@code STRLEN(string)} in SPARQL 1.1
+ * Returns the length of a string.
+ */
+public record StrLenAst(TermAst argument) implements ConstraintAst {}
\ No newline at end of file
diff --git a/src/test/java/fr/inria/corese/core/next/query/impl/parser/SparqlParserStrLenTest.java b/src/test/java/fr/inria/corese/core/next/query/impl/parser/SparqlParserStrLenTest.java
new file mode 100644
index 000000000..073c6c7a7
--- /dev/null
+++ b/src/test/java/fr/inria/corese/core/next/query/impl/parser/SparqlParserStrLenTest.java
@@ -0,0 +1,58 @@
+package fr.inria.corese.core.next.query.impl.parser;
+
+import fr.inria.corese.core.next.query.impl.sparql.ast.BindAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.FilterAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.LiteralAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.QueryAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.VarAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.constraint.EqualsAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.constraint.StrLenAst;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@DisplayName("SPARQL 1.1 - Parser and AST : STRLEN")
+class SparqlParserStrLenTest extends AbstractSparqlParserFeatureTest {
+
+    @Test
+    @DisplayName("BIND(STRLEN(?s) AS ?len)")
+    void shouldParseStrLen() {
+        SparqlParser parser = newParserDefault();
+
+        QueryAst ast = parser.parse("""
+                SELECT * WHERE {
+                  ?s ?p ?o .
+                  BIND(STRLEN(?s) AS ?len)
+                }
+                """);
+
+        assertNotNull(ast);
+        BindAst bind = assertInstanceOf(BindAst.class, ast.whereClause().patterns().getLast());
+        StrLenAst strLen = assertInstanceOf(StrLenAst.class, bind.expression());
+        assertEquals("s", assertInstanceOf(VarAst.class, strLen.argument()).name());
+        assertEquals("len", bind.variable().name());
+    }
+
+    @Test
+    @DisplayName("FILTER(STRLEN(?s) = 2)")
+    void shouldParseStrLenInFilter() {
+        SparqlParser parser = newParserDefault();
+
+        QueryAst ast = parser.parse("""
+                SELECT * WHERE {
+                  ?s ?p ?o .
+                  FILTER(STRLEN(?s) = 2)
+                }
+                """);
+
+        assertNotNull(ast);
+        FilterAst filter = assertInstanceOf(FilterAst.class, ast.whereClause().patterns().getLast());
+        EqualsAst equals = assertInstanceOf(EqualsAst.class, filter.operator());
+        StrLenAst strLen = assertInstanceOf(StrLenAst.class, equals.getLeftArgument());
+        assertEquals("s", assertInstanceOf(VarAst.class, strLen.argument()).name());
+        assertEquals("2", assertInstanceOf(LiteralAst.class, equals.getRightArgument()).lexical());
+    }
+}
\ No newline at end of file