Form 56-1

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Annual Registration Statement

As at December 31, 2009

The Siam Cement Public Company Limited

Table of Contents

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|   | 1.  Risk Factors                                        | 4     |
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|   | 2.  Business Operation                                  | 6     |
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|   | 3.  Operation of Each Business Unit                     | 22    |
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|   | 4.  Research and Development                            | 58    |
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|   | 5.  Asset Used in Operation                             | 59    |
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|   | 6.  Future Projects                                     | 70    |
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|   | 7.  Legal Disputes                                      | 71    |
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|   | 8.  Capital Structure                                   | 72    |
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|   | 9.  Management                                          | 75    |
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|   | 10. Internal Control                                    | 121   |
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|   | 11. Connected Transactions                              | 128   |
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|   | 12. Financial Position and Operating Performance        | 134   |
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|   | 13. Other related Information                           | 152   |
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