diff --git a/pyaccuwage/pdfextract.py b/pyaccuwage/pdfextract.py
index 9bb5e54..e90c84d 100644
--- a/pyaccuwage/pdfextract.py
+++ b/pyaccuwage/pdfextract.py
@@ -137,6 +137,9 @@ class ColumnCollector(object):
         self.empty_rows = 0
         pass
 
+    def __repr__(self):
+        return "<%s: %s>" % (self.__class__.__name__, map(lambda x:x if len(x) < 25 else x[:25] + '..', self.data.values()))
+
     def add(self, data):
         if self.empty_rows > 2:
             raise IsNextField()