The hypothesis of a presence of Keynesian themes in the Prison Notebooks has neither been proposed nor verified by the scholars who have recently devoted their studies to the analysis of economic issues in Gramscian thought. The reason of that lack of attention to this topic is clear: if one browses the index of names in the Prison Notebooks, he will find that Keynes is quoted just once, furthermore indirectly, on the base of a third source (QC 3,160, p. 412). Moreover the catalogue of the “Fondo Gramsci” reveals that Gramsci owned only a book by Keynes before his detention, which yet was not at disposal during his stay at Turi: it was a French edition of the Tract on the Monetary Reform (1923). We are compelled to concede that Keynes’ presence is not macroscopic. However, in my presentation I will carry on the analysis of four notes, written in the first months of 1933, in which I think it is possible to recognise Keynesian themes despite the absence of any explicit reference to Keynes works and writings. The first two notes I will analyse are 10.II,53 and 10.II,55, which concern the relationship between labour and consumption in the capitalist mode of production. In these notes, Gramsci criticizes directly the category of ‘ozio’ (the abstention from labour allowed by the increase of wealth) introduced by Einaudi and indirectly the Keynesian «solution of the economic problem». The role of the Italian liberalist economists for the knowledge of Keynesian themes comes to light also in the note 14,57, in which Gramsci examines the Keynesian relationship between public expenditure and taxation on the base of reports and critical assessments given by Einaudi, Cabiati and Pagni on the Italian economic review «La riforma sociale». Then, I will call attention to the second paragraph of 15,5, in which Gramsci links together some aspects of the marxian theory of money to some suggestions of a previous reading of the Tract on the Monetary Reform, trying to explain some important monetary events of his time: the suspension of the Gold standard, the  proposals of regulated money and the political uses of a pure fiat money. Finally, I will examine a variation introduced by Gramsci in the rewriting of 9,8 in the Notebook 22: this variation concerns the corporatist criticism of the Keynesian economic policy. The reading I have briefly exposed contributes to the reconstruction of three interrelated aspects of Gramscian economic thought: the critique of the modern economic theory, the search for the causes of the Great depression and the interpretation of the Fascist economic interventionism.