Zagreb's Industry as a unique and independent study subject has been neglected by the Croatian Historiography. It is, therefore, the intention of this PhD dissertation to contribute comprehensibly to improve understanding of Zagreb’s economic history during Sava Region (Savska banovina). With the aid of relatively objective facts, dissertation provides an overview of Zagreb’s industrial activities and its dimensions and structures for the period of five years. Sense wise and in relation to the economy, this period represents a post-depression conjunctive progress with all its limitations brought about by political situation in the Kingdom of Yugoslavia and political events on the international scale. During the World Economic Crises and predominantly due to economic policy of the government structures in power, the rise of Zagreb’s industrial activities accomplished in 1920s started to decline in the period 1935 – 1939. This, however is evident in the number of newly established industrial companies as it declined more than 80% compared to the period before the economic crises. It could be concluded therefore, that in the period 1935 – 1939 - which was politically marked by the Milan Stojanović’s Government and his new economic policy - there were no incentives for the establishment of new industrial companies in Zagreb. On the contrary, the existing industrial activity is aggravated and burdened by the uneven taxation amounting up to 40% more then, for example, in Belgrade. Nevertheless, for the period 1935 – 1939, three most symptomatic factors of the industry production capabilities: figures related to overall capital, power-generating capacity and the number of workers and staff members, indicate good business liquidity and stability of the industrial companies in Zagreb.PhD dissertation Industry in Zagreb from 1935 until 1939 greatly contributes to the future research and synthesis (which is still absent in our historiography) related to the economic circumstances in Zagreb between two World Wars.