This study examines the association of the level of strategic information disclosure and strategic disclosure timing and firm value. The study observed strategic disclosure practices of 236 listed companies in Indonesia Stock Exchange (BEI) in year 2015. The level of strategic information disclosure is measured by Strategic Information Disclosure Scores (SIDS) which comprises of both voluntary and mandatory disclosure as required by regulation in Indonesia.  The result shows that the level of strategic information disclosure has positive association with firm value. The result also shows that  the association of strategic information disclosure and firm value only occurs in companies with shorter disclosure timing. This association is not found In companies with longer disclosure timing. In Summary,  it is important for companies to consider  both, the extent of strategic information disclosure  and disclosure timing in increasing firm value.