Thermo-hydro-mechanical densified balsam fir (Abies balsamea (L.) Mill.) wood used in this study was made by compressing wood in the radial (R) direction (ray direction) at a temperature of 230 A degrees C and a compression ratio of 60 % for 20 min, which significantly increased its density and some mechanical properties. However, the elastic parameters of densified wood in the R and tangential (T) directions, [moduli of elasticity (E (R) and E (T)), shear modulus (G (RT)), and Poisson's ratios (mu (RT) and mu (TR))], have seldom been reported because of the relatively small thickness of a densified wood specimen. This study measured the E (R), E (T), G (RT), mu (RT), and mu (TR) of densified balsam fir wood using a digital image correlation method, which was used to measure the strain field of a specimen under compressive loading. The corresponding five elastic parameters of undensified balsam fir wood were also measured. The experimental results were: (1) E (R) was 284 MPa, which was about 66 % lower than that of undensified fir; (2) E (T) was 2551 MPa, which was about ten times larger than that of undensified fir; (3) G (RT) was 21 MPa, which was about 50 % lower than that of undensified fir; and (4) mu (RT) and mu (TR) were 0.104 and 0.331, which were about 75 and 10 % lower than those of undensified fir, respectively.