diff --git a/changelog/fix_incorrect_autocorrect_for_lint_number_conversion.md b/changelog/fix_incorrect_autocorrect_for_lint_number_conversion.md
new file mode 100644
index 00000000000..5f04d30c28a
--- /dev/null
+++ b/changelog/fix_incorrect_autocorrect_for_lint_number_conversion.md
@@ -0,0 +1 @@
+* [#9633](https://github.com/rubocop/rubocop/pull/9633): Fix an incorrect auto-correct for `Lint/NumberConversion` when `to_i` method in symbol form. ([@koic][])
diff --git a/lib/rubocop/cop/lint/number_conversion.rb b/lib/rubocop/cop/lint/number_conversion.rb
index 0e8f0bdeff0..9ae49cb7c7d 100644
--- a/lib/rubocop/cop/lint/number_conversion.rb
+++ b/lib/rubocop/cop/lint/number_conversion.rb
@@ -105,6 +105,8 @@ def handle_as_symbol(node)
               corrected_method: correct_sym_method(to_method)
             )
             add_offense(node, message: message) do |corrector|
+              remove_parentheses(corrector, node) if node.parenthesized?
+
               corrector.replace(sym_node, correct_sym_method(to_method))
             end
           end
@@ -120,6 +122,11 @@ def correct_sym_method(to_method)
           "{ |i| #{body} }"
         end
 
+        def remove_parentheses(corrector, node)
+          corrector.replace(node.loc.begin, ' ')
+          corrector.remove(node.loc.end)
+        end
+
         def ignore_receiver?(receiver)
           if receiver.send_type? && ignored_method?(receiver.method_name)
             true
diff --git a/spec/rubocop/cop/lint/number_conversion_spec.rb b/spec/rubocop/cop/lint/number_conversion_spec.rb
index 950fc16f471..e628c4074e4 100644
--- a/spec/rubocop/cop/lint/number_conversion_spec.rb
+++ b/spec/rubocop/cop/lint/number_conversion_spec.rb
@@ -131,7 +131,18 @@
       RUBY
 
       expect_correction(<<~RUBY)
-        "1,2,3,foo,5,6,7,8".split(',').map({ |i| Integer(i, 10) })
+        "1,2,3,foo,5,6,7,8".split(',').map { |i| Integer(i, 10) }
+      RUBY
+    end
+
+    it 'registers offense and autocorrects without parentheses' do
+      expect_offense(<<~RUBY)
+        "1,2,3,foo,5,6,7,8".split(',').map &:to_i
+        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Replace unsafe number conversion with number class parsing, instead of using &:to_i, use stricter { |i| Integer(i, 10) }.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        "1,2,3,foo,5,6,7,8".split(',').map { |i| Integer(i, 10) }
       RUBY
     end
 
@@ -142,7 +153,7 @@
       RUBY
 
       expect_correction(<<~RUBY)
-        "foo".try({ |i| Float(i) })
+        "foo".try { |i| Float(i) }
       RUBY
     end
 
@@ -153,7 +164,7 @@
       RUBY
 
       expect_correction(<<~RUBY)
-        "foo".send({ |i| Complex(i) })
+        "foo".send { |i| Complex(i) }
       RUBY
     end
   end