The 32-year-old's contract was due to expire at the end of the month but he has now penned a six-month extension.
"I am happy to say we came to an agreement with Hearts and I am staying till the end of season! Let's go Jambos!," Skacel wrote on Twitter.
The former Southampton and Slavia Prague midfielder, in his second spell at Tynecastle, has hit nine goals this season.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| Championship Group | |||||||||
| 1 | Celtic | 2 | 2 | 0 | 0 | 85 | 27 | 58 | 84 |
| 2 | RangersRangers | 1 | 1 | 0 | 0 | 74 | 24 | 50 | 78 |
| 3 | Hearts | 2 | 0 | 1 | 1 | 46 | 37 | 9 | 63 |
| 4 | Kilmarnock | 1 | 0 | 1 | 0 | 43 | 34 | 9 | 52 |
| 5 | St Mirren | 2 | 1 | 0 | 1 | 42 | 46 | -4 | 46 |
| 6 | Dundee | 2 | 0 | 0 | 2 | 46 | 59 | -13 | 41 |
| Relegation Group | |||||||||
| 1 | Hibernian | 2 | 1 | 0 | 1 | 48 | 54 | -6 | 42 |
| 2 | Aberdeen | 2 | 2 | 0 | 0 | 37 | 49 | -12 | 41 |
| 3 | Motherwell | 2 | 1 | 0 | 1 | 50 | 53 | -3 | 40 |
| 4 | Ross County | 2 | 1 | 0 | 1 | 34 | 59 | -25 | 33 |
| 5 | St Johnstone | 2 | 0 | 0 | 2 | 25 | 50 | -25 | 31 |
| R | Livingston | 2 | 1 | 0 | 1 | 25 | 63 | -38 | 21 |
| First Phase | |||||||||
| 1 | Celtic | 33 | 24 | 6 | 3 | 80 | 26 | 54 | 78 |
| 2 | RangersRangers | 33 | 24 | 3 | 6 | 72 | 23 | 49 | 75 |
| 3 | Hearts | 33 | 19 | 5 | 9 | 46 | 34 | 12 | 62 |
| 4 | Kilmarnock | 33 | 13 | 12 | 8 | 43 | 34 | 9 | 51 |
| 5 | St Mirren | 33 | 12 | 7 | 14 | 38 | 43 | -5 | 43 |
| 6 | Dundee | 33 | 10 | 11 | 12 | 44 | 54 | -10 | 41 |
| 7 | Hibernian | 33 | 9 | 12 | 12 | 44 | 51 | -7 | 39 |
| 8 | Motherwell | 33 | 8 | 13 | 12 | 46 | 51 | -5 | 37 |
| 9 | Aberdeen | 33 | 8 | 11 | 14 | 35 | 49 | -14 | 35 |
| 10 | St Johnstone | 33 | 7 | 10 | 16 | 24 | 46 | -22 | 31 |
| 11 | Ross County | 33 | 7 | 9 | 17 | 32 | 56 | -24 | 30 |
| R | Livingston | 33 | 3 | 9 | 21 | 22 | 59 | -37 | 18 |
| > Scottish Premiership Full Table | |||||||||
