We consider the disklikeness of the planar self-affine tile T T generated by an integral expanding matrix A A and a consecutive collinear digit set D = { 0 , v , 2 v , ⋯ , ( | q | − 1 ) v } ⊂ Z 2 {\mathcal {D}}= \{0, v, 2v, \cdots , (|q|-1)v \}\subset {\Bbb {Z}}^2 . Let f ( x ) = x 2 + p x + q f(x)=x^{2}+ p x+ q be the characteristic polynomial of A A . We show that the tile T T is disklike if and only if 2 | p | ≤ | q + 2 | 2|p|\leq |q+2| . Moreover, T T is a hexagonal tile for all the cases except when p = 0 p=0 , in which case T T is a square tile. The proof depends on certain special devices to count the numbers of nodal points and neighbors of T T and a criterion of Bandt and Wang (2001) on disklikeness.