diff --git a/programmers/크기가 작은 부분문자열/solution.java b/programmers/크기가 작은 부분문자열/solution.java
new file mode 100644
index 0000000..5e9ed24
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+++ b/programmers/크기가 작은 부분문자열/solution.java	
@@ -0,0 +1,16 @@
+// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/147355
+
+import java.lang.StringBuilder;
+class Solution {
+    public int solution(String t, String p) {
+        StringBuilder sb = new StringBuilder();
+        int answer = 0, len = p.length();
+        long ip = Long.parseLong(p);
+        for(int a = 0; a < t.length()-len+1; a++){
+            for(int b = a; b < a+len; b++) sb.append(t.charAt(b));
+            if(Long.parseLong(sb.toString())<=ip) answer++;
+            sb.setLength(0);
+        }
+        return answer;
+    }
+}
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