diff --git a/changelog/fix_an_incorrect_autocorrect_for_style_redundant_conditional.md b/changelog/fix_an_incorrect_autocorrect_for_style_redundant_conditional.md
new file mode 100644
index 00000000000..82c60442860
--- /dev/null
+++ b/changelog/fix_an_incorrect_autocorrect_for_style_redundant_conditional.md
@@ -0,0 +1 @@
+* [#12202](https://github.com/rubocop/rubocop/pull/12202): Fix an incorrect autocorrect for `Style/RedundantConditional` when unless/else with boolean results. ([@ydah][])
diff --git a/lib/rubocop/cop/style/redundant_conditional.rb b/lib/rubocop/cop/style/redundant_conditional.rb
index 30cdd053b5b..f98b33af695 100644
--- a/lib/rubocop/cop/style/redundant_conditional.rb
+++ b/lib/rubocop/cop/style/redundant_conditional.rb
@@ -70,19 +70,11 @@ def offense?(node)
 
         def replacement_condition(node)
           condition = node.condition.source
-          expression = invert_expression?(node) ? "!(#{condition})" : condition
+          expression = redundant_condition_inverted?(node) ? "!(#{condition})" : condition
 
           node.elsif? ? indented_else_node(expression, node) : expression
         end
 
-        def invert_expression?(node)
-          (
-            (node.if? || node.elsif? || node.ternary?) && redundant_condition_inverted?(node)
-          ) || (
-            node.unless? && redundant_condition?(node)
-          )
-        end
-
         def indented_else_node(expression, node)
           "else\n#{indentation(node)}#{expression}"
         end
diff --git a/spec/rubocop/cop/style/redundant_conditional_spec.rb b/spec/rubocop/cop/style/redundant_conditional_spec.rb
index bc2c8add106..158940dbd5a 100644
--- a/spec/rubocop/cop/style/redundant_conditional_spec.rb
+++ b/spec/rubocop/cop/style/redundant_conditional_spec.rb
@@ -57,6 +57,36 @@
     RUBY
   end
 
+  it 'registers an offense for unless/else with boolean results' do
+    expect_offense(<<~RUBY)
+      unless x == y
+      ^^^^^^^^^^^^^ This conditional expression can just be replaced by `!(x == y)`.
+        true
+      else
+        false
+      end
+    RUBY
+
+    expect_correction(<<~RUBY)
+      !(x == y)
+    RUBY
+  end
+
+  it 'registers an offense for unless/else with negated boolean results' do
+    expect_offense(<<~RUBY)
+      unless x == y
+      ^^^^^^^^^^^^^ This conditional expression can just be replaced by `x == y`.
+        false
+      else
+        true
+      end
+    RUBY
+
+    expect_correction(<<~RUBY)
+      x == y
+    RUBY
+  end
+
   it 'registers an offense for if/elsif/else with boolean results' do
     expect_offense(<<~RUBY)
       if cond