diff --git a/build.gradle.kts b/build.gradle.kts
index 2ec2853..6073570 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "com.mapk"
-version = "0.21"
+version = "0.22"
 
 java {
     sourceCompatibility = JavaVersion.VERSION_1_8
diff --git a/src/main/kotlin/com/mapk/kmapper/KMapper.kt b/src/main/kotlin/com/mapk/kmapper/KMapper.kt
index dc9461e..910cead 100644
--- a/src/main/kotlin/com/mapk/kmapper/KMapper.kt
+++ b/src/main/kotlin/com/mapk/kmapper/KMapper.kt
@@ -8,6 +8,8 @@ import com.mapk.core.getAliasOrName
 import com.mapk.core.isUseDefaultArgument
 import com.mapk.core.toKConstructor
 import java.lang.reflect.Method
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.ConcurrentMap
 import kotlin.reflect.KClass
 import kotlin.reflect.KFunction
 import kotlin.reflect.KParameter
@@ -31,7 +33,20 @@ class KMapper<T : Any> private constructor(
         .filter { it.kind != KParameter.Kind.INSTANCE && !it.isUseDefaultArgument() }
         .associate { (parameterNameConverter(it.getAliasOrName()!!)) to ParameterForMap.newInstance(it) }
 
+    private val getCache: ConcurrentMap<KClass<*>, List<(Any, ArgumentBucket) -> Unit>> = ConcurrentHashMap()
+
     private fun bindArguments(argumentBucket: ArgumentBucket, src: Any) {
+        val clazz = src::class
+
+        // キャッシュヒットしたら登録した内容に沿って取得処理を行う
+        getCache[clazz]?.let { getters ->
+            // 取得対象フィールドは十分絞り込んでいると考えられるため、終了判定は行わない
+            getters.forEach { it(src, argumentBucket) }
+            return
+        }
+
+        val tempCacheArrayList = ArrayList<(Any, ArgumentBucket) -> Unit>()
+
         src::class.memberProperties.forEach outer@{ property ->
             // propertyが公開されていない場合は処理を行わない
             if (property.visibility != KVisibility.PUBLIC) return@outer
@@ -46,14 +61,22 @@ class KMapper<T : Any> private constructor(
                 if (it is KGetterAlias) alias = it.value
             }
 
-            parameterMap[alias ?: property.name]?.let {
-                // javaGetterを呼び出す方が高速
+            parameterMap[alias ?: property.name]?.let { param ->
                 javaGetter.isAccessible = true
-                argumentBucket.putIfAbsent(it.param, javaGetter.invoke(src)?.let { value -> it.mapObject(value) })
-                // 終了判定
-                if (argumentBucket.isInitialized) return
+
+                val tempCache = { value: Any, bucket: ArgumentBucket ->
+                    // 初期化済みであれば高コストな取得処理は行わない
+                    if (!bucket.containsKey(param.param)) {
+                        // javaGetterを呼び出す方が高速
+                        bucket.putIfAbsent(param.param, javaGetter.invoke(value)?.let { param.mapObject(it) })
+                    }
+                }
+                tempCache(src, argumentBucket)
+                tempCacheArrayList.add(tempCache)
+                // キャッシュの整合性を保つため、ここでは終了判定を行わない
             }
         }
+        getCache.putIfAbsent(clazz, tempCacheArrayList)
     }
 
     private fun bindArguments(argumentBucket: ArgumentBucket, src: Map<*, *>) {
diff --git a/src/main/kotlin/com/mapk/kmapper/ParameterForMap.kt b/src/main/kotlin/com/mapk/kmapper/ParameterForMap.kt
index 4dd300e..25d1875 100644
--- a/src/main/kotlin/com/mapk/kmapper/ParameterForMap.kt
+++ b/src/main/kotlin/com/mapk/kmapper/ParameterForMap.kt
@@ -1,6 +1,8 @@
 package com.mapk.kmapper
 
 import com.mapk.core.EnumMapper
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.ConcurrentMap
 import kotlin.reflect.KClass
 import kotlin.reflect.KFunction
 import kotlin.reflect.KParameter
@@ -13,7 +15,7 @@ internal class ParameterForMap<T : Any> private constructor(val param: KParamete
     // リストの長さが小さいと期待されるためこの形で実装しているが、理想的にはmap的なものが使いたい
     private val converters: Set<Pair<KClass<*>, KFunction<T>>> = clazz.getConverters()
 
-    private val convertCache: MutableMap<KClass<*>, (Any) -> Any?> = HashMap()
+    private val convertCache: ConcurrentMap<KClass<*>, (Any) -> Any?> = ConcurrentHashMap()
 
     fun <U : Any> mapObject(value: U): Any? {
         val valueClazz: KClass<*> = value::class
@@ -23,7 +25,7 @@ internal class ParameterForMap<T : Any> private constructor(val param: KParamete
 
         // パラメータに対してvalueが代入可能（同じもしくは親クラス）であればそのまま用いる
         if (clazz.isSuperclassOf(valueClazz)) {
-            convertCache[valueClazz] = { value }
+            convertCache.putIfAbsent(valueClazz) { it }
             return value
         }
 
@@ -38,7 +40,7 @@ internal class ParameterForMap<T : Any> private constructor(val param: KParamete
             clazz == String::class -> { { it.toString() } }
             else -> throw IllegalArgumentException("Can not convert $valueClazz to $clazz")
         }
-        convertCache[valueClazz] = lambda
+        convertCache.putIfAbsent(valueClazz, lambda)
         return lambda(value)
     }