diff --git a/cpp/src/arrow/compute/api_scalar.cc b/cpp/src/arrow/compute/api_scalar.cc
index 01f705f7f84c1..76707cf143c3b 100644
--- a/cpp/src/arrow/compute/api_scalar.cc
+++ b/cpp/src/arrow/compute/api_scalar.cc
@@ -564,13 +564,7 @@ constexpr char RoundToMultipleOptions::kTypeName[];
 SetLookupOptions::SetLookupOptions(Datum value_set, bool skip_nulls)
     : FunctionOptions(internal::kSetLookupOptionsType),
       value_set(std::move(value_set)),
-      skip_nulls(skip_nulls) {
-  if (skip_nulls) {
-    this->null_matching_behavior = SetLookupOptions::SKIP;
-  } else {
-    this->null_matching_behavior = SetLookupOptions::MATCH;
-  }
-}
+      skip_nulls(std::move(skip_nulls)) {}
 SetLookupOptions::SetLookupOptions(
     Datum value_set, SetLookupOptions::NullMatchingBehavior null_matching_behavior)
     : FunctionOptions(internal::kSetLookupOptionsType),
@@ -578,7 +572,7 @@ SetLookupOptions::SetLookupOptions(
       null_matching_behavior(std::move(null_matching_behavior)) {}
 SetLookupOptions::SetLookupOptions()
     : SetLookupOptions({}, SetLookupOptions::NullMatchingBehavior::MATCH) {}
-SetLookupOptions::NullMatchingBehavior SetLookupOptions::getNullMatchingBehavior() const {
+SetLookupOptions::NullMatchingBehavior SetLookupOptions::GetNullMatchingBehavior() const {
   if (!this->skip_nulls.has_value()) {
     return this->null_matching_behavior;
   } else if (this->skip_nulls.value()) {
diff --git a/cpp/src/arrow/compute/api_scalar.h b/cpp/src/arrow/compute/api_scalar.h
index 8714d4a245530..7391f12bd6b4e 100644
--- a/cpp/src/arrow/compute/api_scalar.h
+++ b/cpp/src/arrow/compute/api_scalar.h
@@ -295,7 +295,7 @@ class ARROW_EXPORT SetLookupOptions : public FunctionOptions {
   NullMatchingBehavior null_matching_behavior;
 
   // DEPRECATED(will be removed after removing of skip_nulls)
-  NullMatchingBehavior getNullMatchingBehavior() const;
+  NullMatchingBehavior GetNullMatchingBehavior() const;
 
   // DEPRECATED(use null_matching_behavior instead)
   /// Whether nulls in `value_set` count for lookup.
diff --git a/cpp/src/arrow/compute/kernels/scalar_set_lookup.cc b/cpp/src/arrow/compute/kernels/scalar_set_lookup.cc
index d5cf258a267f5..dd6fdc0212db7 100644
--- a/cpp/src/arrow/compute/kernels/scalar_set_lookup.cc
+++ b/cpp/src/arrow/compute/kernels/scalar_set_lookup.cc
@@ -44,7 +44,7 @@ struct SetLookupState : public SetLookupStateBase {
   explicit SetLookupState(MemoryPool* pool) : memory_pool(pool) {}
 
   Status Init(const SetLookupOptions& options) {
-    this->null_matching_behavior = options.getNullMatchingBehavior();
+    this->null_matching_behavior = options.GetNullMatchingBehavior();
     if (options.value_set.is_array()) {
       const ArrayData& value_set = *options.value_set.array();
       memo_index_to_value_index.reserve(value_set.length);
@@ -127,7 +127,7 @@ struct SetLookupState<NullType> : public SetLookupStateBase {
   explicit SetLookupState(MemoryPool*) {}
 
   Status Init(SetLookupOptions& options) {
-    null_matching_behavior = options.getNullMatchingBehavior();
+    null_matching_behavior = options.GetNullMatchingBehavior();
     value_set_has_null = (options.value_set.length() > 0) &&
                          this->null_matching_behavior != SetLookupOptions::SKIP;
     value_set_type = null();